Open-source Tools
Browse open-source SEO tools. Apply additional filters to refine results.
Showing 582 tools
Auto-GPT-SEO
Autonomous AI agents tailored for executing complex SEO tasks and keyword strategies
Hugging Face Transformers
Open-source library to build and test NLP models for understanding conversational voice queries
Hugging Face
Open-source platform for NLP and machine learning models
Next.js
React framework for building SEO-friendly web applications with server-side rendering and static generation
Next.js i18n Routing
Built-in internationalized routing for Next.js apps with automatic locale detection and SEO optimization
Hugging Face Models
Platform to run open-source LLMs to audit how different models categorize specific domains
Next.js Metadata Favicon
Integrated framework utility for managing favicons via the Metadata API in Next.js 13+ and 14+ projects
Deno.serve
Modern, secure router and server for Deno-based domain infrastructures
LangChain
Framework for developing LLM applications with integrated source citation tracking
LangChain-SEO-Check
Open source integration for monitoring RAG retrieval frequency of specific domains
yt-dlp
Open-source command-line tool for downloading videos and extracting metadata for analysis
Hugo
Fastest open-source static site generator for massive SEO-ready architectures
Bun.serve
Extremely fast HTTP server and router for modern JavaScript environments
Playwright
Framework for Web testing and automation that enables reliable end-to-end testing for modern web apps
FastAPI-SEO-API
Template for building high-performance SEO microservices and custom internal tools
Hoppscotch
Open-source API development ecosystem used by SEOs to test and debug headless CMS endpoints and schema APIs
Strapi
Open-source headless CMS that provides full control over eCommerce SEO metadata via API
Strapi SEO Plugin
Open-source plugin for Strapi CMS to manage meta tags sitemaps and social sharing previews
Nuxt
Intuitive Vue framework for server-side rendering and static site generation focusing on performance
Caddy Server
Powerful, enterprise-ready open source web server with automatic HTTPS routing
Kuma
Self-hosted uptime monitoring tool like Uptime Robot but with a clean UI
Llama 3 (Meta)
Highly capable open-source large language model for private AI content infrastructure
Sherlock
Powerful CLI tool to find usernames across over 400 social networks for footprinting
Hugging Face SEO Tools
Community-driven machine learning models for title generation and content classification
Mastodon
Decentralized social profiles that provide high crawlable search signals
Ghost
Open-source publishing platform focused on speed and native SEO features
Traefik
Cloud-native edge router that automatically discovers and configures routing
Meilisearch
Lightning fast open-source search engine API to improve site-search SEO and UX
Astro
The web framework for content-driven websites with built-in SEO optimizations and API routes
n8n
Fair-code workflow automation tool for hosting private SEO automation pipelines
ClickHouse
Fast open-source column-oriented database for real-time log analytics
LazyDocker
Simple terminal UI for docker and docker-compose written in Go
LlamaIndex
Framework for connecting private data to LLMs for custom GEO applications
Metabase
Open-source BI tool that makes SEO data exploration easy for teams
Streamlit SEO Dashboard
Interactive web-based dashboard for visualizing Search Console and GA4 data built with Streamlit and Python
Spacy
Industrial-strength NLP for advanced content analysis and semantic keyword clustering
Directus SEO
Open-data platform that turns any SQL database into a headless CMS with SEO meta management
AdGuard Home
Network-wide software for blocking ads and tracking and managing DNS traffic
K6
Open-source load testing tool for monitoring site performance under stress
Medusa
The open-source Shopify alternative focused on developer experience and high-speed SEO performance
Loki
Horizontally-scalable highly-available multi-tenant log aggregation system
React Flow
Open-source library for building node-based editors and behavior visualizers
PostHog Replay
Self-hostable session recording for developers who want full data control
Umami
Self-hosted privacy-focused open-source analytics with a simple interface
WebArchiver
Open-source tool to create local archives of websites for change comparison
Saleor
Headless open-source eCommerce platform with high-performance GraphQL API and SEO-optimized storefronts
PostHog
Open-source product analytics suite that provides heatmaps and session recording for SEO conversion analysis
Nginx Proxy Manager
Docker container for managing Nginx proxy hosts with a simple web interface
Coolify
An open-source self-hostable alternative to Heroku/Netlify/Vercel for app deployment
DSPy
Framework for programmatically optimizing language model prompts and weights for reliable content outputs
Gemma (Google)
Open-source family of lightweight, state-of-the-art models for AI developers
GoAccess
Real-time web log analyzer and interactive viewer for terminal or browser
Nuclei
Fast and customizable vulnerability scanner based on simple YAML templates
Plausible Analytics
Privacy-focused, open-source alternative to Google Analytics with lightweight script
Squoosh CLI
Command line version of the popular image optimizer
Web-Check
All-in-one open-source OSINT and technical SEO tool for analyzing infrastructure and headers
SvelteKit Routing
Filesystem-based routing framework for building highly optimized domain paths
Changedetection.io
Self-hosted open-source website change detection and notification service
PyScript-SEO
Run Python SEO scripts directly in the browser for client-side audit tools
GPT-Researcher
Autonomous agent designed for comprehensive online SEO and topical research
SingleFile
Chrome extension that saves an entire page into a single HTML file for archiving
Vector by Datadog
High-performance observability data pipeline for collecting and transforming logs
Airbyte
Open-source data integration engine for syncing SEO data to warehouses
Bert-SEO-Cluster
Use BERT embeddings to cluster keywords by intent and semantic meaning automatically
PWA Builder Icon Generator
Microsoft-backed tool to generate a full suite of icons required for a Progressive Web App (PWA) manifest
VitePress
Static site generator focused on documentation with superior SEO defaults
SearXNG
Privacy-respecting metasearch engine and alternative to Google
Hugging Face Open LLM Leaderboard
Compare and analyze models used in AEO to understand which LLMs prioritize specific data sources
Quicklink
Open source library that speeds up subsequent page loads by prefetching in-viewport links during idle time
Amass
In-depth DNS enumeration and network mapping for asset discovery
LanguageTool API
Open-source proofreading service for more than 30 languages with an accessible developer API
OpenReplay
Open-source session replay suite with privacy focus and self-hosting options
OpenSearch
Community-driven open-source search and analytics suite for log data
Subfinder
Fast passive subdomain enumeration tool for domain discovery
Imgproxy
Fast and secure standalone server for resizing and converting remote images on-the-fly
Fluent Bit
Lightweight log processor and forwarder for edge and cloud environments
Storm
Open-source knowledge curation engine that generates SEO-friendly wiki pages
GrowthBook
Open-source feature flagging and A/B testing platform that works with your existing data warehouse
Statamic (Free Core)
Flat-first CMS that is inherently SEO-friendly and fast for smaller projects
Grafana Mimir
Horizontally scalable long-term storage for Prometheus metrics and logs
NGINX Unit
Versatile application server that handles routing for multiple languages in one place
RudderStack
Customer data platform (CDP) for routing SEO event data to BI warehouses
Verba
Open-source RAG application to explore SEO datasets using LLMs locally
Keybert
Minimal keyword extraction technique that leverages BERT embeddings for SEO relevance
Shopware
Modern open-source eCommerce platform from Germany focusing on storytelling and SEO experiences
Traefik Mesh
Service mesh for microservices that simplifies internal traffic routing and monitoring
Advertools
Productivity and analysis tools for online marketing including SEO and SEM automation tasks
HAProxy Ingress
Kubernetes ingress controller based on HAProxy for high-performance traffic routing
Hush
A simple no-nonsense blocker for those annoying cookie consent notices
Meltano
Open-source DataOps platform for building SEO data pipelines
Mind-Search
Open-source AI search agent that mimics human research behavior for SEO
Web Stories for WP
Official Google plugin to create SEO-optimized visual stories for publishers
Microsoft Clarity SDK
Lightweight SDK for integrating Clarity session replays into native mobile apps
Podcast Index
Open-source database preserving decentralized podcasting for independent SEO research
Blacklight-CLI
Identify ad trackers and privacy issues that could impact SEO rankings
CrUX API
Access real-user experience data from the Chrome User Experience Report database
Vite Plugin Favicons
Automation plugin for Vite-based projects that generates all favicon sizes during the build process
DefiLlama
Leading DeFi aggregator for tracking search volume by TVL and protocol
Svelte-Favicons
A collection of reactive Svelte components to manage favicons and dynamic badges in SvelteKit apps
GA4 Measurement Protocol
Send data directly to Google Analytics servers via HTTP requests for server tracking
Farcaster Search
Search engine for the Farcaster protocol to optimize decentralized casts
SERPAPI (G0)
High-performance Go library for interacting with major search engine scraping APIs
IndexNow Python Script
CLI tool to automate bulk URL submissions to IndexNow API
Promtail
Agent which ships local logs to Grafana Loki for centralized SEO analysis
AutoGPT
Experimental open-source application showcasing the capabilities of the GPT-4 language model for SEO automation
Next/Image
Framework component for Next.js that automatically optimizes images for improved LCP and CLS
Ant Design Icon Maker
Create consistent favicons following the Ant Design system principles with built-in accessibility checks
Puppeteer
Node library to control headless Chrome for complex SPA SEO rendering tests
Django Redirects App
Built-in Django framework utility for managing site-wide redirects within a SQL database
ELK Stack (Elasticsearch)
The standard for searching, analyzing, and visualizing log data in real-time at scale
Elasticsearch
Distributed RESTful search and analytics engine for log storage
Express Router
Flexible and powerful routing middleware for Node.js web applications and SEO APIs
Grafana
Observability and BI platform used for real-time SEO monitoring dashboards
Gatsby
Open-source frontend framework for creating blazing fast SEO-friendly eCommerce storefronts
Scrapy
Powerful open-source web crawling framework for Python developers to build custom SEO scrapers
React Router
The standard routing library for React applications across domains
Request-SEO
Pythonic way to handle HTTP requests for checking status codes and redirect chains
Huginn
Open-source system for building agents that monitor and act on web changes
Pandas-SEO-Toolkit
Custom pandas extensions for handling large scale SEO data exports and SERP analysis
Preact
Fast 3kB alternative to React with the same ES6 API, significantly improving bundle size and speed
CURL
Command line tool and library for transferring data with URLs for all protocols
Istio
Service mesh platform to manage complex microservice routing and traffic flow
Certbot
Effortless tool for automatically using Let's Encrypt certificates to enable HTTPS
AMP Browser Extension
Instantly validates Accelerated Mobile Pages and provides real-time debugging for web developers
Fastify
Extremely fast and low overhead web framework for Node.js, built for performance
Selenium
Industry standard framework for browser automation and functional web testing
Selenium-SEO-Tester
Automated browser testing for UI/UX elements that impact SEO performance
Lighthouse
Open-source automated tool for improving the quality of web pages including SEO and performance
Bitwarden (Self-Hosted)
Open-source password management solution that can be hosted on your own infrastructure
Sharp
High-performance Node.js image processing module built on the libvips library for fast transformations
Workbox
JavaScript libraries for adding offline support and power to Progressive Web Apps
Tqdm-SEO-Progress
Smart progress bars for long-running SEO crawl scripts and data processing
Glances
An Eye on your system. A curses based monitoring tool for Linux/Windows/macOS
Envoy Proxy
Edge and service proxy designed for cloud-native applications and complex routing
Squoosh
Image compression and optimization tool to reduce page load times and improve SEO
Nginx Rewrite Module
Core module for handling URL transformations, subdomain routing, and complex regex-based redirection
Matomo Analytics
Leading open-source web analytics platform that gives you full control over your SEO data
Dark Reader
Enables dark mode for every website to reduce eye strain during long SEO audit sessions
Matomo
Privacy-focused open-source web analytics platform that provides 100% data ownership
Matplotlib-SEO
Generate static SEO performance reports and trend lines for monthly audits
HAProxy
High-performance load balancer and routing software for complex domain architectures
Kibana
Visualization dashboard for Elasticsearch data used for SEO log mapping
Rasa
Open-source machine learning framework for building text and voice-based conversational AI assistants
Shields.io Favicons
Integration for developers to add live status icons or badges that can be served as dynamic favicon updates
Watchtower
Monitor and update Docker containers automatically when images change
Web Vitals Library
A tiny modular library for measuring all the Web Vitals metrics on real users in the field
Haystack by Deepset
Open-source NLP framework for building search systems with verifiable citations
Eleventy
A simpler static site generator for Node.js that focuses on zero-client-side JavaScript
FB-Prophet-SEO
Forecasting tool used to predict SEO traffic trends based on historical data
Netlify CMS (Decap)
Open-source Git-based CMS for static site generators with simple SEO markdown config
Puppeteer Recorder
Chrome extension to record actions and create change detection scripts
Gensim
Topic modeling for SEO to discover semantic relationships between keyword clusters
Nginx
Web server capable of complex URL rewriting and reverse proxy routing logic
Aiohttp-Crawler
Asynchronous HTTP client for ultra-fast SEO crawling and API requests
Plotly-SEO-Graphs
Library for creating interactive SEO trend charts and backlink visualizations
Telegraf
Agent for collecting metrics and logs from stacks sensors and systems
Logstash
Server-side data processing pipeline that ingests data from multiple sources
Brotli
Generic-purpose lossless compression algorithm providing better SEO performance
Requests-HTML
Pythonic HTML parsing for humans with JavaScript support for easy SEO scraping
Zuul
L7 application gateway that provides dynamic routing, monitoring, and security
Rendertron
A headless Chrome rendering solution designed to render & serialise web pages on the fly
Spree Commerce
Modular open-source headless eCommerce platform with multi-store support and SEO flexibility
Filebeat
Lightweight shipper for forwarding and centralizing log data from servers
NLTK
Complete toolkit for natural language processing and lexical SEO analysis
Fluentd
Unified logging layer to unify data collection and consumption for SEO audits
OWASP ZAP
The world’s most widely used web app scanner for finding vulnerabilities
Lynis
Security auditing tool for Linux, macOS, and UNIX-based systems
OpenResty
Full-fledged web platform that integrates Nginx and Lua for dynamic routing
Tabula
Tool for liberating data tables trapped inside PDF files into CSV for SEO keyword research
CapRover
Easy-to-use app/database deployment & web server manager for your own server
Image-SEO-Optimizer
Bulk image optimization script using Python to reduce file size and update alt tags
LanguageTool
Open-source grammar, style, and spell checker for high-quality SEO content
Nightwatch.js
Node.js powered end-to-end testing framework used for SERP monitoring tasks
PyTrendS
Unofficial API for Google Trends for automated keyword popularity analysis and data retrieval
Schedule-SEO
Job scheduling for Python to automate daily SEO rank tracking and reports
Seaborn-SEO
Statistical data visualization library for analyzing SEO correlations and metrics
Magento Open Source
Enterprise-grade open-source commerce platform offering deep technical SEO and catalog customization
Wappalyzer
Identify web technologies on websites including CMS frameworks and payment processors
Wappalyzer CLI
Automated technology stack detection for lists of websites via command line
Cockpit
Web-based graphical interface for Linux servers to monitor and manage system services
Pytest-SEO
Framework for writing automated tests for website SEO requirements and status
OpenCart
Free open-source eCommerce platform with a massive marketplace for SEO extensions
Critical
Extracts and inlines critical-path CSS to improve First Contentful Paint and rendering speed
HSTS-Checker
Python tool to check for HTTP Strict Transport Security implementation across site lists
Puppeteer-SEO-Script
Automated SEO health checks using headless Chrome to simulate user behavior
Thumbor
Open-source smart imaging service which allows on-demand cropping, resizing and flipping of images
Yourls
Your Own URL Shortener - open-source PHP scripts for custom domain routing
Gutenberg-SEO-Parser
Parse WordPress Gutenberg blocks to analyze content structure and keyword density
FuzzyWuzzy
Fuzzy string matching for identifying duplicate content and near-match keywords
WooCommerce
The most popular open-source eCommerce plugin for WordPress with extensive SEO extension ecosystem
Email-Harvester-SEO
Scrapes contact information from websites for link building outreach campaigns
ImageMagick
The industry-standard open-source software suite for creating, editing, and converting bitmap images
TextBlob
Simplified text processing for sentiment analysis and noun phrase extraction in SEO
Django-SEO-JS
SEO support for high-performing JS-heavy Django apps using pre-rendering
OpenProject
Open-source project management for secure SEO infrastructure
PurgeCSS
Tool to remove unused CSS from your project which helps in improving Largest Contentful Paint (LCP)
PrestaShop
Feature-rich open-source eCommerce solution with modular architecture for technical SEO control
ZMap
Open-source network scanner that enables researchers to easily perform Internet-wide surveys
ExifTool
Powerful command-line application for reading writing and editing document metadata including PDF and images
Taiga
Open-source project management for agile SEO teams
Tota11y
An accessibility visualization toolkit that helps visualize how a page performs with assistive technology
Vips
Extremely fast, low-memory image processing library with bindings for many languages
Google-API-Python-Client
Official Google client library for Search Console and Analytics API integration
Oscar
Open-source eCommerce framework for Django designed for domain-driven SEO architecture
PyPDF2
Extract metadata and text from PDF files for document SEO optimization
Web Vitals Extension
Chrome extension for measuring Core Web Vitals in real-time while browsing your website
Nikto
Open source web server scanner which performs comprehensive tests against items
Conda-SEO-Env
Pre-configured Anaconda environments specifically for SEO data science projects
Lighthouse CI
Automated tool to run Lighthouse in CI/CD pipelines to prevent performance regressions during deployment
SiteSpeed.io
Open-source tool suite that helps you measure and monitor the performance of your web pages
PDF-Miner
Data extraction tool that helps SEOs turn PDF content into crawlable HTML or text formats
Varnish Cache
High-performance HTTP accelerator for caching content and improving response times
MozJpeg
Open-source JPEG encoder that improves compression while maintaining full compatibility
Solidus
A powerful open-source eCommerce framework for high-volume retailers built on Ruby on Rails
Pa11y
Command-line interface to run accessibility audits and monitor SEO performance
Android Asset Studio
Google-provided tool for creating launcher icons and web manifest icons according to Material Design guidelines
WooCommerce SEO
Open-source SEO extension for WordPress e-commerce stores
Core Web Vitals Annotation
Adds annotations to your Google Analytics charts to highlight Core Web Vital changes
Jovo Framework
Open-source framework for building professional voice apps across multiple platforms and devices
Singer
Open-source standard for writing scripts that move SEO data
Urllib3
Powerful HTTP client for Python with thread-safe connection pooling for SEO
WhatWeb
Next-generation web scanner that identifies CMS platforms, plugins, and server headers
Accessibility Developer Tools
Library of accessibility audit rules used by Google in various testing environments
Common Crawl
Open repository of web crawl data that can be used for large-scale link graph analysis
Open-Web-Analytics
Open source web analytics that provides similar features to Google Analytics
Syslog-ng
Flexible and highly scalable system logging application for multi-platform
Critters
A Webpack plugin to inline your critical CSS and lazy-load the rest to improve FCP
Snapshot
Off-chain voting search tool for auditing decentralized community intent
Apache Traffic Server
Scalable HTTP intermediate and forward proxy server for high-performance routing
Boomerang
A JavaScript library that measures the performance of your website from the user's experience
Lxml-SEO
High-performance XML and HTML parsing for rapid technical SEO audit tools
MTR
Combined ping and traceroute tool for diagnosing network latency and packet loss
PyOpenSSL
Python wrapper for OpenSSL to audit SSL certificates for technical SEO health
Rsyslog
The rocket-fast system for log processing with high performance features
Tldextract
Separate the TLD from the domain name for bulk domain and backlink analysis
Wasabi
Open-source A/B testing platform originally developed by Intuit for high-performance experiments
Webhint
Linting tool for the web that helps improve accessibility, speed, and cross-browser compatibility
Bleach
HTML sanitizing library that can be used to clean scraped content for SEO
Tab Wrangler
Automatically closes inactive tabs to save memory and stay organized
Ghostery
Privacy extension that shows trackers and allows you to block them to see page speed impact
Metarank
Open-source ranking service for personalized search results and LTR
Trafilatura
Python package and command-line tool to gather text and metadata on the web
Apache Flume
Distributed and reliable service for efficiently collecting large log data
Schema.org Sitemap
Advanced script for creating sitemaps that include Schema.org metadata for enhanced rich snippet crawling
Dimensions
A tool for designers to measure screen dimensions in the browser for pixel perfect layouts
FastImage
A small Ruby library to find the size and type of a remote image without downloading the whole file
GMB API Tracker
Custom scripts and tools for tracking GMB ranks via official Google APIs
JSONView
Formats and validates JSON responses in the browser for easier API and structured data debugging
Open-Source-GEO
Library for managing geographic coordinates and local business schema for SEO
EditThisCookie
Manage cookies for SEO testing including location spoofing and session management.
Image-Optimizer-CLI
Lossless image compression via CLI to improve page speed and SEO
Laravel Redirection
Package for handling complex SEO redirections and domain routing within Laravel applications
Picfit
An image resizing server written in Go that can use different storage backends like S3 or GCS
Robotstxt-validator
Fast library to check robots.txt compliance with Google standards
PageSpeed Insights CLI
Official Google tool to wrap PageSpeed Insights API for bulk performance audits
Pushshift.io
Large-scale Reddit data API used by researchers for massive historical data analysis and SEO patterns
Tab Manager Plus
Efficiently manage hundreds of tabs with search filter and deduplication features
AWStats
Advanced Web Statistics tool for generating graphical reports from server logs
Baidu MIP (Mobile Instant Pages)
Open-source framework to speed up mobile pages for instant loading on Baidu Search results
Domain-Scan
Tool for scanning large batches of domains for various security and web stats
GrandNode
Open-source cross-platform eCommerce solution based on .NET Core and MongoDB for SEO speed
LinkClump
Allows you to open copy or bookmark multiple links at once by dragging a selection box
Markdown-lint
CLI tool to ensure SEO-friendly structural integrity for markdown-based content
Yoast Real-time Content Analysis
SDK for developers to integrate Yoast-style SEO analysis into custom publishing platforms
CSP Evaluator
Evaluates Content Security Policies to detect bypasses and improve site security
Extruct
Python library for extracting structured data from HTML files supporting Microdata and JSON-LD
Image Downloader
Bulk download all images on a page with filtering by size and type
WhatFont
The easiest way to identify fonts on web pages by simply hovering over the text
Linkclump
Drag a box around links to open them all in new tabs or copy them to clipboard
Schema-Generator
A terminal-based generator for JSON-LD structured data following Schema.org standards
Clear Cache
One-click cache and data clearing to test live SEO changes without browser lag.
DuckDuckHack
Open source community for building Instant Answers and plugins for DuckDuckGo
Search-Console-Connector
Python library for easy authentication and data retrieval from the Google Search Console API
SeoPanel
Open source SEO control panel for managing multiple sites and tracking keyword rankings in one place
Page Analytics by Google
Legacy tool to see how customers interact with your pages (Visual GA)
Gulp-Favicons
A Gulp plugin that automates the generation of every possible favicon format and HTML tag for your project
Cloudflare-SEO-Worker
Python scripts for Cloudflare Workers to manage edge SEO tasks and redirects
Check My Links
Link crawler that finds broken links on a webpage to assist in technical SEO cleanup
AMP Toolbox
Set of tools and libraries to help create and maintain high-performance AMP pages
Google Maps Platform
API for integrating location-based features and local search results into apps
Google News Sitemap Generator
Script-based generator specifically designed to follow the strict requirements of Google News indexing
SerpApi Client Libraries
Open-source wrappers for SerpApi across 10+ languages to simplify SEO data integration
Enonic
Composable content platform for building high-performance SEO-friendly progressive web apps
Clear Cache Shortcut
One-click button to clear browser cache and cookies for testing fresh site changes
Koko Analytics
Privacy-friendly analytics plugin for WordPress that does not use cookies or external services
Mobile-Friendly Test CLI
CLI wrapper for Google Search Console Mobile-Friendly Test API for bulk audits
View Rendered Source
Chrome extension to compare raw HTML and rendered DOM for JavaScript SEO troubleshooting
Eye Dropper
Color picker that allows you to pick colors from any webpage or color picker interface
Measure-it
Draw a ruler across any webpage to check the dimensions of elements
Open Multiple URLs
Paste a list of URLs and open them all in new tabs simultaneously
Link Gopher
Browser extension to extract all links from a webpage and sort them for outreach lists
Apache mod_rewrite
The industry-standard module for rule-based URL manipulation and routing
Bash Toolkit (grep/awk)
Essential command-line tools for manual log parsing and SEO filtering
Beautiful Soup
Library for pulling data out of HTML and XML files for rapid SEO audit script development
Bing URL Submission Plugin
WordPress plugin for automatic URL indexing to Bing and IndexNow
Drupal Simple XML Sitemap
The standard module for Drupal to generate multilingual and custom entity sitemaps automatically
Glitch Favicon Generator
Community-driven tool on Glitch for creating animated or dynamic favicons using HTML5 and JS
Gnu-Wget
Command-line utility for retrieving files using HTTP/HTTPS frequently used for site mirroring
Gzip-Checker
Verify server-side compression for SEO performance using Python's native modules
HeidiSQL
Lightweight, open-source SQL client for Windows to manage databases and servers
ImageOptim
Desktop application that optimizes images to reduce load times and improve LCP and overall speed
Journald
Systemd logging service for modern Linux distributions with binary logs
Nmap
Industry standard tool for network exploration and security auditing
OpenStreetMap
The free wiki world map often used as a data source for local geo tools
OptiPNG
An advanced PNG optimizer that recompresses image files to a smaller size without losing information
PHP Graphics Magick
Powerful PHP extension for image manipulation using the GraphicsMagick library
PyCSV-SEO-Merge
Tool for merging multiple SEO tool exports (Ahrefs, Semrush) into a master file
Robots-Parser
Compliance checker for robots.txt files to ensure search engine access control
SQLite-SEO-Storage
Lightweight database management for storing large-scale crawl data locally
Scribus
Open-source desktop publishing software capable of creating highly structured and SEO-ready PDFs
SmokePing
Latentcy logging and graphing system for monitoring network connections
Webalizer
Fast free web server log file analysis program producing HTML reports
Webmin
Web-based interface for system administration for Unix and Linux servers
Yunohost
Debian-based OS for self-hosting web services with ease and automation
Zabbix Performance
Enterprise monitoring solution that can be configured to track website performance metrics
Payload CMS
Next-generation headless CMS with TypeScript support and extensible SEO configuration hooks
GPT-Crawler
Crawler that crawls websites to generate knowledge files from web content for custom GPTs and LLM training
Postiz
Open-source social media and SEO content scheduling platform with AI insights
Kutt
Modern open-source URL shortener with custom domains and analytics routing
ScrapeGraphAI
Open-source Python library for scraping search results using Large Language Models
Bundlephobia
Find the performance cost of adding a npm package to your web application bundles
Quickwit
Sub-second search engine on cloud storage for log management and SEO
Linkwarden
Self-hosted collaborative bookmark manager with routing preservation and archiving
Perplexica
Advanced AI-powered search engine and open-source Perplexity alternative
Next.js Sitemap Generator
The go-to package for generating sitemaps automatically within Next.js and Vercel environments
Farfalle
Open-source AI search engine and answer engine for local or cloud LLMs
Serpbear
Self-hosted open-source search engine rank tracking software
Hydration Overlay
Debug tool for identifying hydration mismatches in SSR frameworks like Next.js and Nuxt
Proxy-List
Automated script to fetch and check live proxies for scraping and automation
Scribe
Open-source markdown-based documentation and SEO platform for developer-centric content marketing
Statping-ng
Updated self-hosted status page with charts and automated monitoring for apps
Mastra
Framework for building AI agents that can handle complex SEO automation tasks
SerpBear
Open-source search engine rank tracking software that allows you to track your website rankings for free
Search-LLM
A framework for integrating search engine results into LLM prompts for SEO
LinkStack
Self-hosted link-in-bio platform for managing backlink landing pages and professional profiles
Carbonalyser
Evaluate the environmental impact of your website based on data transfer
Kusk Gateway
OpenAPI-driven gateway for Kubernetes that simplifies RESTful service routing
LinkExtractor
Open-source Python library for extracting and monitoring backlinks from raw HTML and web crawls
OpenPerplex
Open-source AI-powered search engine focused on citations and source transparency
Request Indexer
Automated tool to request Google indexing for pages using the Indexing API
Resumes-Parser-SEO
Library focused on extracting SEO-rich entities and semantic keywords from structured documents
TextGenerator
Open-source AI content generation and SEO tool with community-driven team templates
GEO-Bench
Open-source benchmark for evaluating Generative Engine Optimization strategies
Serp-Explorer
Open-source rank tracker that scrapes search results without expensive proxies
Auto-SEO-Description-Gen
Uses LLMs to generate meta descriptions and alt text based on page content
ALwrity
Open-source AI digital marketing platform supporting RAG and SERP factual content generation
Agentic-SEO
Framework for deploying multi-agent systems to handle technical audits and strategy mapping
LLM-Explorer-Open
Open source framework to test how different prompt structures affect site visibility
SEOEstate
Open-source website crawler and technical SEO analyzer for developers and technical consultants.
Zeno
Open-source crawler and SEO toolset for developers built with Node.js
SEO Audits Toolkit
All-in-one open-source collection for website health and security
Serp-Api-Open
Community project to scrape SERP data for keyword research without costs
Markdown-SEO-Linter
Linter for markdown files to ensure correct heading hierarchy and meta data
SEOnaut
Comprehensive open-source SEO audit tool for deep site scans
Keyword-Clustering-Tool
Python script that clusters keywords based on SERP similarity to group intent
Open-SEO-Writer
AI-powered content generator optimized for specific keyword density and intent
Swetrix
Fully open-source and privacy-focused analytics with deep focus on performance and SEO tracking
SERP-Volatility-Tracker
Monitors daily fluctuations in search results to detect Google algorithm updates
Local-SEO-Audit-Tool
Script to compare local business listings across multiple directories for consistency
Dino DNS
Open-source, lightweight DNS record manager designed for fast SEO testing and domain mapping
Indexing API Tool
Open-source script for bulk-sending URLs to Google’s Indexing API via Google Sheets
LLM Analytics
Open-source framework to track how LLMs cite and reference website content
RankTools
Open-source command line tool for monitoring keyword rankings across major engines
SEO Dash
Open-source dashboard template for tracking SEO performance across multiple domains
SEOlizer
Open-source tool for real-time log analysis and technical SEO monitoring
Search Engine Scanner
Fast open-source CLI for scraping search engine results
Serply
Open-source Python library for scraping search engine results for SaaS dev teams
Dalton
Open-source local search rank tracker and citation audit tool for developers and small agencies
PySEO Keyword Tool
Python-based open source tool for programmatically generating keyword reports and clusters
RustySEO
Cross-platform marketing toolkit for deep crawl and server log analysis
Slowpoke
Open-source desktop tool to analyze and visualize website performance over time
Internal-Link-Juice-Analyzer
Visualizes internal link flow and calculates PageRank distribution for websites
LLM-Visibility-Library
Open-source repository for benchmarking site appearance in various Large Language Models
Favicon-Switcher
Small JS library to switch favicons based on media queries like dark mode or system theme changes
Sa11y
Accessibility checker that focuses on content and provides visual cues for editors within their CMS
Search-One Local SEO Tool
Open-source repository for scraping local search results and identifying competitors
Searchviermu
Python-based automation scripts for bulk SERP analysis and keyword intent
SEO-Writing-Assistant
AI-driven script to generate SEO-friendly content outlines based on top SERP results
GSC Guardian
Self-hosted dashboard for monitoring Google Search Console health and anomalies
SEO Python Library
Open-source library for automating technical SEO tasks like redirect checks and meta analysis
Local-LLM-SEO
Open-source scripts for bulk generating localized service pages using Llama 3 or GPT-4
Answer-The-Public-Scraper
Python script to scrape autocomplete suggestions for "People Also Ask" style research
Dynamic Favicon
JavaScript library that allows developers to change favicons dynamically based on user status or site notifications
Keywell
Open-source utility for semantic keyword grouping and basic topic modeling for developers
Mobile-Friendly-CLI
Test URLs against mobile-friendly criteria from the command line
Site-Audit-CLI
High-performance CLI tool for technical SEO audits and dead link detection
URL Inspection API Samples
Python and Node.js samples for programmatically inspecting URLs via GSC API
ContentSwift
Open-source content research and optimization tool for semantic SEO
FastSitemap Generator
Go-based high-performance CLI tool for massive sitemaps, capable of processing 100k URLs per minute
Free-GPB-Auditor
Open-source script for auditing Google Business Profiles for local ranking factors
SEOPivot
Emerging open-source desktop dashboard for monitoring site health and schema
Search engine keywords
CLI tool for fetching keyword suggestions from various search engine autocomplete APIs
Backlink-Checker
Command-line tool to check backlink status and anchor text from a list of URLs
Core Web Vitals Visualizer
Visual overlay of CWV metrics directly on the elements of your page
Ferryman
Open-source tool for handling large-scale e-commerce SEO redirects and path mapping
GSC-Data-Exporter
Python-based CLI for bulk exporting Google Search Console data to CSV
Gmerlin
Open-source email verification tool designed for high-speed checking of link building lists
Greenflare
Open-source desktop SEO crawler for privacy-conscious technical website audits
LLM-Benchmark-Crawler
Scripts to automate querying multiple LLMs and tracking brand citation frequency
Local Search Data
Open-source scraper for extracting local business data from maps
Mallard Duck
Lightweight open-source eCommerce SEO auditing tool for small online shop owners
PySEO
Open-source Python framework for custom scheduled SEO crawling and data extraction
Search Console Bulk URL Inspection
Tool to inspect URLs in bulk using the Google Search Console Inspection API
Serpident
Open-source light-weight rank tracker for personal or agency use
Ant-Team Yandex XML Tools
Specialized scripts and tools for managing Yandex XML limits and parsing tasks
Map-Tracker
Open-source python script to track local search rankings on Google Maps via SerpApi
Naver-SEO-Python
Python scripts for automating Naver Search Advisor tasks and checking indexing status via CLI
CLS Visualizer
Chrome extension that overlays Cumulative Layout Shift areas directly on your webpage
LinkBuildingTools
Open-source repository of scripts and workflows for link prospecting and domain validation
SEO.js
Open-source JavaScript library for checking SEO best practices in code
Fast Favicon
Lightweight CLI tool for developers to automate favicon generation from a single source image via terminal
Klustr
Open-source Python library for hierarchical keyword clustering and automated taxonomy generation
Schema-Writer-AI
AI tool that generates complex localized Schema.org markup for service areas and entities
Scry
Open-source oracle search explorer for tracking price feed SEO accuracy
Favicon-Audit-CLI
Terminal tool for CI/CD pipelines to ensure all pages in a build have required favicon meta tags
Grip
Command-line tool for visualizing how GitHub Readmes look, but often used for performance profiling local docs
Photon
Incredibly fast crawler designed for OSINT and domain profiling
Warp
High-performance edge routing and proxy library built in Rust for ultra-fast redirection
Instant.page
Small script that preloads links on hover to make page navigation feel instantaneous for users
Markdown to HTML
Convert technical documentation for web deployment with SEO in mind
Logspout
Log routing for Docker containers to stream SEO logs to external analyzers
Ackee
Self-hosted privacy-focused analytics tool for developers who care about their own data
Anvaka Sayit
Interactive graph visualization of subreddit relationships to identify niche clusters and link opportunities
Broken-Link-Checker
Find broken links on websites with this highly configurable CLI tool
GoatCounter
Open-source web analytics service that is easy to use and meaningful without tracking individuals
Webdiff
Python-based command line tool for visually comparing website versions
Pyppeteer
Python port of Puppeteer for rendering JavaScript-heavy pages for SEO audits
Sitemap.js
High-level sitemap-generating library for Node.js environments to automate large-scale XML generation
SocioBoard
Open-source social media management with white-label capabilities for marketing agencies
YouTube Transcript Extractor
Utility for developers to programmatically pull video transcripts for SEO analysis
MassDNS
High-performance DNS stub resolver for bulk lookups and reconnaissance
PyTrends
Unofficial Python API for Google Trends for automated data collection and analysis
Speed-Measure-Plugin
CLI performance measurements for build-time SEO impact analysis
Assetfinder
Find hostnames which may be related to a given domain (part of the tomnomnom suite)
Perfume.js
Telemetry library for measuring First Paint, LCP, and FID and reporting them to your analytics
Staticman
Open-source static site comment engine for building community on JAMstack sites
Wapiti
Open-source web security auditor that identifies SEO-impacting vulnerabilities
Bundlewatch
Monitor your app's bundle size in your PRs to ensure performance doesn't degrade over time
Knockpy
Python tool designed to enumerate subdomains on a target domain through a wordlist
Shynet
Modern self-hosted web analytics that works without cookies or JavaScript for extreme privacy
BestIcon
A simple favicon service written in Go that can find and proxy favicons for any website with a single API call
Gevent-SEO-Crawler
High-performance concurrent crawler using gevent for large scale site audits
Python-Magic
File type identification for SEO asset audits (images, videos, documents)
Yellow Lab Tools
Open-source online test that detects performance smells and front-end code quality issues
Polyglot
Multilingual NLP library for keyword extraction and entity recognition in diverse languages
Wand
Simple and fast Python library for image processing based on ImageMagick
A11y Machine
Automated accessibility testing tool that crawls a website and generates a visual report of issues
Handshake
Decentralized naming protocol for censorship-resistant SEO and domains
Sitemap Generator CLI
Node.js command-line interface tool to generate sitemaps for any website directly from the terminal
Sitemap-Generator-CLI
Create comprehensive XML sitemaps for large websites from the command line
Subreddit Analysis
A Python-based tool for scraping and analyzing subreddit data for SEO and linguistic patterns
Expired-Domain-Finder
Searches for expired domains with high authority based on backlink metrics
Abot
Open-source crawler for developers to build custom scheduled technical SEO audits
Ally.js
Library to help modern web applications with accessibility, focus management, and keyboard navigation
Broken Link Checker
Open-source CLI tool to find broken links and server errors across entire domains
Flyimg
Dockerized PHP application for image resizing, cropping and effects on-the-fly with S3 support
Langdetect
Port of Google's language-detection library for multilingual SEO site audits
Offen
Fair web analytics that requires user consent and treats website owners and users as equals
Puppeteer-Renderer
Simple web service to render web pages as HTML or PDF using Puppeteer backend
Scrapy-Selenium
Middleware for Scrapy to handle JavaScript pages using Selenium for SEO
Static Jinja
Open-source library to build static websites with Jinja2 templates
SEO-Analyzer
Python script to analyze a website for SEO issues like broken links and missing meta tags
Schema dts
Strongly typed models for Schema.org vocabulary in TypeScript and JavaScript
Scrapy-Cluster
Distributed crawling system for massive SEO datasets using Redis and Kafka
Domain MOD
Open-source application to manage your domains and registrars
Node-SEO
SEO analysis tool for Node.js projects to check content and metadata
Text-Summarizer
AI-powered tool to generate SEO meta descriptions and summaries from content
Image-Optimizer-SEO
Batch processes and compresses images for web while maintaining SEO metadata
Glogg
Multi-platform GUI to explore and search through long or complex log files
Web Archives
Browser extension to view archived and cached versions of web pages
The Graph
Decentralized protocol for indexing and querying blockchain search data
Waybackpy
Python wrapper for the Wayback Machine API to track historical SEO changes
Favicon Grabber
Open-source API and tool to extract the highest resolution favicon from any website URL for competitive research
PageXray
Analyze web page requests and resource sizes to optimize performance
Anchor Image
Lightweight image server for self-hosting with built-in on-the-fly resizing and cropping
IPFS Search
Search engine for the InterPlanetary File System to audit decentralized content
LinkSource
Open-source link prospect management tool for organizing potential domains and tracking contact status
MobiMetrics
Open-source script collection for basic mobile rank tracking
PDF-XRay
Python-based tool for extracting and analyzing PDF structures to identify SEO issues or hidden data
PySEO Tools
Open-source Python scripts for automating repetitive SEO tasks and audits
Robots-Parser-CLI
Test and validate robots.txt rules against specific URLs via terminal
SEO Mapper
Open-source tool to visualize internal linking and site architecture
SEO-Checker
Node.js based open source SEO checker for developers
SEO-Go
Lightweight open-source CLI for checking meta tags and broken links
SEO-Log-Analyzer
A Python script to parse and analyze server logs specifically for SEO bot behavior
Screaming Frog to LLM
A Python script bridging Screaming Frog export data with OpenAI for automated technical SEO recommendations
Sitemap Generator
Open-source tool to generate massive XML sitemaps for enterprise eCommerce catalogs
Sitemapper
High-performance open-source sitemap generator and validator for large-scale enterprise web architectures
Taudio
Open-source repository for audio processing and metadata extraction for SEO
Text-to-JSON Schema
Open source utility to convert unstructured text into valid Schema.org JSON-LD snippets
Ubersuggest-Open
Community maintained scraper for keyword suggestions and search volume data
Ultimate Sitemap Parser
Robust Python sitemap parser to extract URLs and detect errors in XML sitemap files
YouTube Comment Suite
Open-source tool for managing and analyzing thousands of YouTube video comments
Content-Auditor
Open-source Python script for analyzing site-wide content quality and planning updates
Icon-Gen
Multi-platform CLI that converts SVG or PNG to icons for web Windows macOS and Linux in one command
Page Ruler Redux
Measure page elements in pixels for layout and UX optimization
Hemingway-Open
Open-source implementation of writing analysis for readability and SEO
Whois-Python
Python library to retrieve WHOIS information for domain age and expiration tracking
SEO-Scraper-JS
High-performance Javascript scraper designed to extract SEO metrics and meta data from large batches of URLs
Serp-Api (Open Source)
Self-hosted SERP scraping API using Puppeteer and Node.js for private data pipelines
Site-Crawler
Fast multi-threaded web crawler for site mapping and technical audits
Site-Inspector
Open-source tool to find broken links and common technical SEO errors
User-Agent Switcher
Switch between different user-agents to test mobile and bot crawling
Wordsmith
An open-source script alternative for Google Sheets to handle bulk keyword research and SERP analysis via API
Geo-IP-CLI
Check server location and IP data to optimize international SEO hosting
Hreflang-Checker
Automated validation of hreflang tags across international website versions
Link Checker
Verify internal and external links for broken connections and redirect loops
PySitemap
Python library for creating high-performance sitemap crawlers and generators for custom web apps
Quick Source Viewer
A refined view of the page source with syntax highlighting and resource grouping
Search-Console-CLI
Quickly query Google Search Console data directly from your terminal
Sitemap-Validator
CLI utility to validate XML sitemaps against XSD schemas and link health
Imager
Simple and lightweight image manipulation library for PHP with a focus on ease of use
Readability-LXP
Library for measuring text readability scores (Flesch-Kincaid) for content optimization
SEO-Lint
Linter for SEO to validate meta tags and structural elements on HTML files
Tanaguru
Open-source automated accessibility assessment tool focused on high-volume website testing
Validator-Collection
Collection of Python validation functions for checking URL and email formats
Extensions Manager
Toggle browser extensions on and off quickly to avoid memory bloat and conflicts
JSON-LD-Gen
Command-line utility for generating complex structured data scripts
Canonical-Audit-Tool
Identifies canonical tag mismatches and loops across large site architectures
Copy All URLs
Quickly copy all open tab URLs to the clipboard in multiple formats for research sharing
Static-Site-SEO-Checker
Validation tool for meta tags and structure in static site generators like Jekyll
Structured Data Linter
Verify structured data markup and visualize how it appears in search results
Google Sheets Sitemap Maker
Custom script template to crawl URLs from a Google Sheet and generate a valid XML sitemap file
Page Load Time
Minimalist extension that displays the exact loading time of a webpage in the browser toolbar
Static Site Checker
Audit tool for static site generators and JAMstack SEO
Stet
Open-source privacy-first website analytics server designed for high-performance self-hosting
Alt Text Tester
Hover over images to see their alt text and identify missing attributes for accessibility
Link Grabber
Extracts all links from a webpage and displays them in a sortable list
SEO Keyword Research Tool
Python-based keyword suggestion tool utilizing Google Autocomplete
Link-Stats-CLI
Extract and categorize all internal and external links from a page
Local-SEO-Checklist
GitHub repository containing a comprehensive technical checklist for optimizing local business websites
Analog
Extremely fast log file analyzer that provides basic traffic and bot statistics
BacklinkChecker
Open-source Python utility for monitoring backlink status and detecting removed links
Dynamic-Favicon-JS
Lightweight vanilla JS script to update favicon badges with numbers for real-time notifications
Folder2Sitemap
Simple utility for developers that converts a local folder structure into a valid XML sitemap
Go-SEOSpider
CLI-based website crawler written in Go for high-speed technical SEO audits
Keywords Every Day
Open source alternative for keyword and competitor lookup
Kvext
Python library for extracting keywords and entities from podcast transcripts
NAP Hunter
Chrome extension to search for Name, Address, and Phone inconsistencies across the web
NapHunter
Open-source script for finding NAP inconsistencies for local SEO audits
SSEO
Open source technical SEO analyzer for identifying onsite optimizations
Schema.org Scanner
Open source CLI tool for scanning entire domains for schema health
Skeleton
Open-source crawler for identifying broken links and SEO issues in a CLI environment
Subquery
Data indexing search tool for fast dApp search performance on Polkadot
Tighthouse
Terminal-based Lighthouse runner for quick bulk performance audits
View Image Info
Extracts image metadata including alt text, file size, and dimensions directly from the browser.
Wiki-Audit Tool
Open-source script for checking Wikipedia and Wikidata mentions to audit brand authority
Word Counter Plus
Simple tool to count words and characters in selected text on any web page
Keywords-CLI
Extract keyword density and frequency from HTML documents via terminal
Dino
Simple CLI for checking status codes and broken links on small to medium sites
F12 - Website Analyzer
Inspect headers cookies and scripts in a single simplified view
Favicon-Fetch
Node.js package that efficiently finds and downloads the best quality favicon for any given URL
Googlebot Simulator
Python script to simulate how Googlebot fetches and renders specific web pages
Link-Context-Parser
A specialized tool for analyzing the surrounding text and semantic context of internal and external backlinks
Local-SEO-Schema-CLI
Generate local business schema markup via terminal for multiple locations
NoFollow Simple
Highlights all nofollow and sponsored links on a page to visualize internal link equity
Data Layer Checker
Chrome extension to debug and verify data layer implementations for SEO tracking
Hreflang-Checker-CLI
Validate hreflang tags across international sites via command line
WordCounter
Quickly count words and characters of selected text on any webpage
Header-Checker
Bulk check HTTP response headers for large lists of SEO landing pages
Quick SEO
A lightweight toolbar for quick access to domain and page SEO metrics
Keyword Researcher Python
Tool to generate bulk keyword ideas from Google suggestion APIs
PyBacklinkCheck
Python library to check if a backlink exists on a specific page programmatically
SEO-CLI
Node.js CLI for linting on-page SEO elements like title, meta, and headers
Screaming Frog to Sheets
A custom AppsScript for pushing Screaming Frog crawl data automatically to Google Sheets
Security-Headers-CLI
Quickly check security headers that impact SEO and site trust
Simple URL Copy
One-click to copy current URL or all URLs from a window with clean formatting
Sitemap Mergetool
Simple command line utility to merge multiple XML sitemaps into a single index file automatically
Suckless SEO Checker
Ultra-minimalist CLI tool for checking basic on-page SEO factors
Yandex Search Result Scraper
Python library to scrape and parse Yandex search engine results pages effectively
PageSizer
Check the uncompressed size of a webpage including all assets
Crawl-Delay-CLI
Analyze crawl budget and server response times via command line
HARO SEO Filters
Open-source script to filter HARO emails for high-relevance link opportunities
Rank-CLI
Lightweight command line tool to check ranking of a domain for specific keywords
SeoToaster
Open-source CMS and e-commerce platform with built-in scheduled SEO crawling
Sitemap Downloader
Automatically finds and downloads XML sitemaps for the current domain
WP Local SEO
WordPress plugin for local business schema and map integration
hreflang-php
Lightweight PHP library for generating and managing SEO-compliant hreflang HTML tags in backend applications
Google Drive Sitemap Scraper
Script that scrapes URLs from lists in Google Drive to perform status code checks
Favicon Grabber API
Fast and reliable JSON API to retrieve a website's favicon and touch icons for use in applications
Logwatch
Customizable log analysis system which parses system logs and sends reports
Sitemap XML Editor
Open source desktop editor for Windows to manage and edit extremely large XML sitemaps offline