MIT Tools

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Showing 338 tools

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Auto-GPT-SEO

Autonomous AI agents tailored for executing complex SEO tasks and keyword strategies

AI Automation Open-source
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Next.js

React framework for building SEO-friendly web applications with server-side rendering and static generation

JavaScript SEO & Dynamic Rendering Open-source
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Next.js i18n Routing

Built-in internationalized routing for Next.js apps with automatic locale detection and SEO optimization

International SEO & Hreflang Management Open-source
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Next.js Metadata Favicon

Integrated framework utility for managing favicons via the Metadata API in Next.js 13+ and 14+ projects

Favicon Tools Open-source
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Deno.serve

Modern, secure router and server for Deno-based domain infrastructures

Site Management Open-source
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LangChain

Framework for developing LLM applications with integrated source citation tracking

ChatGPT & LLM Citation Tracking Open-source
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LangChain-SEO-Check

Open source integration for monitoring RAG retrieval frequency of specific domains

AI Visibility Trackers Open-source
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Bun.serve

Extremely fast HTTP server and router for modern JavaScript environments

Site Management Open-source
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FastAPI-SEO-API

Template for building high-performance SEO microservices and custom internal tools

Python SEO Libraries Open-source
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Hoppscotch

Open-source API development ecosystem used by SEOs to test and debug headless CMS endpoints and schema APIs

Technical SEO Open-source
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Strapi

Open-source headless CMS that provides full control over eCommerce SEO metadata via API

eCommerce SEO Open-source
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Strapi SEO Plugin

Open-source plugin for Strapi CMS to manage meta tags sitemaps and social sharing previews

Headless CMS SEO Open-source
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Nuxt

Intuitive Vue framework for server-side rendering and static site generation focusing on performance

JavaScript SEO & Dynamic Rendering Open-source
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Kuma

Self-hosted uptime monitoring tool like Uptime Robot but with a clean UI

Performance & Monitoring Open-source
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Sherlock

Powerful CLI tool to find usernames across over 400 social networks for footprinting

Search Intelligence Open-source
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Ghost

Open-source publishing platform focused on speed and native SEO features

CMS & SEO Hosting Open-source
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Meilisearch

Lightning fast open-source search engine API to improve site-search SEO and UX

Technical SEO Open-source
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Astro

The web framework for content-driven websites with built-in SEO optimizations and API routes

Technical SEO Open-source
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LazyDocker

Simple terminal UI for docker and docker-compose written in Go

Server Management Open-source
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LlamaIndex

Framework for connecting private data to LLMs for custom GEO applications

GEO Tools Open-source
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Spacy

Industrial-strength NLP for advanced content analysis and semantic keyword clustering

Python SEO Libraries Open-source
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Medusa

The open-source Shopify alternative focused on developer experience and high-speed SEO performance

eCommerce SEO Open-source
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React Flow

Open-source library for building node-based editors and behavior visualizers

Heatmaps & Session Recording Open-source
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PostHog Replay

Self-hostable session recording for developers who want full data control

Heatmaps & Session Recording Open-source
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Umami

Self-hosted privacy-focused open-source analytics with a simple interface

Analytics & Reporting Open-source
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WebArchiver

Open-source tool to create local archives of websites for change comparison

Change Detection Open-source
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PostHog

Open-source product analytics suite that provides heatmaps and session recording for SEO conversion analysis

Analytics Open-source
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Nginx Proxy Manager

Docker container for managing Nginx proxy hosts with a simple web interface

Server Management Open-source
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DSPy

Framework for programmatically optimizing language model prompts and weights for reliable content outputs

Content for GEO Open-source
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GoAccess

Real-time web log analyzer and interactive viewer for terminal or browser

Log File Analyzers Open-source
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Nuclei

Fast and customizable vulnerability scanner based on simple YAML templates

Security & Infrastructure Open-source
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OpenAI-SEO-Scripts

Python scripts leveraging GPT APIs for automated meta description and content gen

Python SEO Libraries Paid
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Web-Check

All-in-one open-source OSINT and technical SEO tool for analyzing infrastructure and headers

Technical SEO Open-source
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SvelteKit Routing

Filesystem-based routing framework for building highly optimized domain paths

Site Management Open-source
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GPT-Researcher

Autonomous agent designed for comprehensive online SEO and topical research

AI SEO Open-source
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Airbyte

Open-source data integration engine for syncing SEO data to warehouses

Data Studio & BI Connectors Open-source
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PWA Builder Icon Generator

Microsoft-backed tool to generate a full suite of icons required for a Progressive Web App (PWA) manifest

Favicon Tools Open-source
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VitePress

Static site generator focused on documentation with superior SEO defaults

CMS & SEO Hosting Open-source
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Subfinder

Fast passive subdomain enumeration tool for domain discovery

Domain Intel Open-source
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Imgproxy

Fast and secure standalone server for resizing and converting remote images on-the-fly

Image Optimization & CDN Open-source
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Storm

Open-source knowledge curation engine that generates SEO-friendly wiki pages

AI SEO Open-source
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Statamic (Free Core)

Flat-first CMS that is inherently SEO-friendly and fast for smaller projects

Technical SEO Open-source
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Keybert

Minimal keyword extraction technique that leverages BERT embeddings for SEO relevance

Python SEO Libraries Open-source
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Shopware

Modern open-source eCommerce platform from Germany focusing on storytelling and SEO experiences

eCommerce SEO Open-source
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Advertools

Productivity and analysis tools for online marketing including SEO and SEM automation tasks

Python SEO Libraries Open-source
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Hush

A simple no-nonsense blocker for those annoying cookie consent notices

Browser Extensions Open-source
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Meltano

Open-source DataOps platform for building SEO data pipelines

Data Studio & BI Connectors Open-source
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Accessibility Insights

Microsoft-built tool that helps developers find and fix accessibility issues in web and android apps

Accessibility Testing Tools Free
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Microsoft Clarity SDK

Lightweight SDK for integrating Clarity session replays into native mobile apps

Heatmaps & Session Recording Open-source
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Blacklight-CLI

Identify ad trackers and privacy issues that could impact SEO rankings

Technical SEO Open-source
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Vite Plugin Favicons

Automation plugin for Vite-based projects that generates all favicon sizes during the build process

Favicon Tools Open-source
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SERP-API-Python

Wrapper for SERP APIs to integrate live search results into Python SEO tools

Python SEO Libraries Paid
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Svelte-Favicons

A collection of reactive Svelte components to manage favicons and dynamic badges in SvelteKit apps

Favicon Tools Open-source
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Farcaster Search

Search engine for the Farcaster protocol to optimize decentralized casts

Web3 & Blockchain SEO Tools Open-source
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IndexNow

Protocol for instant notification to search engines when website content is created or updated

Indexation Free
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SERPAPI (G0)

High-performance Go library for interacting with major search engine scraping APIs

API-First SEO Platforms Open-source
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IndexNow Python Script

CLI tool to automate bulk URL submissions to IndexNow API

Bing SEO Open-source
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SVG Repo Favicons

Massive library of free SVG icons curated specifically for use as high-resolution web favicons

Favicon Tools Free
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AutoGPT

Experimental open-source application showcasing the capabilities of the GPT-4 language model for SEO automation

AI SEO Open-source
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Next/Image

Framework component for Next.js that automatically optimizes images for improved LCP and CLS

Core Web Vitals Open-source
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Ant Design Icon Maker

Create consistent favicons following the Ant Design system principles with built-in accessibility checks

Favicon Tools Open-source
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Express Router

Flexible and powerful routing middleware for Node.js web applications and SEO APIs

GEO & Routing Open-source
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Gatsby

Open-source frontend framework for creating blazing fast SEO-friendly eCommerce storefronts

eCommerce SEO Open-source
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React Router

The standard routing library for React applications across domains

Site Management Open-source
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Cypress

Next generation front end testing tool for change detection in dev

Change Detection Freemium
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Huginn

Open-source system for building agents that monitor and act on web changes

Change Detection Open-source
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Preact

Fast 3kB alternative to React with the same ES6 API, significantly improving bundle size and speed

Core Web Vitals Open-source
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CURL

Command line tool and library for transferring data with URLs for all protocols

Network & Infrastructure Open-source
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Fastify

Extremely fast and low overhead web framework for Node.js, built for performance

Core Web Vitals Open-source
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Tqdm-SEO-Progress

Smart progress bars for long-running SEO crawl scripts and data processing

Python SEO Libraries Open-source
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Dark Reader

Enables dark mode for every website to reduce eye strain during long SEO audit sessions

Browser Tools & Bookmarklets Open-source
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Eleventy

A simpler static site generator for Node.js that focuses on zero-client-side JavaScript

JavaScript SEO & Dynamic Rendering Open-source
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FB-Prophet-SEO

Forecasting tool used to predict SEO traffic trends based on historical data

Python SEO Libraries Open-source
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Netlify CMS (Decap)

Open-source Git-based CMS for static site generators with simple SEO markdown config

Headless CMS SEO Open-source
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Plotly-SEO-Graphs

Library for creating interactive SEO trend charts and backlink visualizations

Python SEO Libraries Open-source
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Telegraf

Agent for collecting metrics and logs from stacks sensors and systems

Log File Analyzers Open-source
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Brotli

Generic-purpose lossless compression algorithm providing better SEO performance

Technical SEO Open-source
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Requests-HTML

Pythonic HTML parsing for humans with JavaScript support for easy SEO scraping

Python SEO Libraries Open-source
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Tabula

Tool for liberating data tables trapped inside PDF files into CSV for SEO keyword research

PDF & Document SEO Open-source
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Nightwatch.js

Node.js powered end-to-end testing framework used for SERP monitoring tasks

Rank Tracking Open-source
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PyTrendS

Unofficial API for Google Trends for automated keyword popularity analysis and data retrieval

Python SEO Libraries Open-source
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Schedule-SEO

Job scheduling for Python to automate daily SEO rank tracking and reports

Python SEO Libraries Open-source
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Pytest-SEO

Framework for writing automated tests for website SEO requirements and status

Python SEO Libraries Open-source
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Puppeteer-SEO-Script

Automated SEO health checks using headless Chrome to simulate user behavior

Performance Open-source
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Thumbor

Open-source smart imaging service which allows on-demand cropping, resizing and flipping of images

Image Optimization & CDN Open-source
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Yourls

Your Own URL Shortener - open-source PHP scripts for custom domain routing

Routing & Redirects Open-source
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FuzzyWuzzy

Fuzzy string matching for identifying duplicate content and near-match keywords

Python SEO Libraries Open-source
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TextBlob

Simplified text processing for sentiment analysis and noun phrase extraction in SEO

Python SEO Libraries Open-source
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Django-SEO-JS

SEO support for high-performing JS-heavy Django apps using pre-rendering

Python SEO Libraries Open-source
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PurgeCSS

Tool to remove unused CSS from your project which helps in improving Largest Contentful Paint (LCP)

Core Web Vitals Open-source
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Tota11y

An accessibility visualization toolkit that helps visualize how a page performs with assistive technology

Accessibility Testing Tools Open-source
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SiteSpeed.io

Open-source tool suite that helps you measure and monitor the performance of your web pages

Core Web Vitals Open-source
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PDF-Miner

Data extraction tool that helps SEOs turn PDF content into crawlable HTML or text formats

PDF & Document SEO Open-source
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A11y Project

A community-driven effort to make digital accessibility easier to understand and implement

Accessibility Testing Tools Free
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Urllib3

Powerful HTTP client for Python with thread-safe connection pooling for SEO

Python SEO Libraries Open-source
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Snapshot

Off-chain voting search tool for auditing decentralized community intent

Web3 & Blockchain SEO Tools Open-source
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Tab Wrangler

Automatically closes inactive tabs to save memory and stay organized

Browser Extensions Open-source
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Dimensions

A tool for designers to measure screen dimensions in the browser for pixel perfect layouts

Browser Tools & Bookmarklets Open-source
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FastImage

A small Ruby library to find the size and type of a remote image without downloading the whole file

Image Optimization & CDN Open-source
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JSONView

Formats and validates JSON responses in the browser for easier API and structured data debugging

Browser Tools & Bookmarklets Open-source
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Image-Optimizer-CLI

Lossless image compression via CLI to improve page speed and SEO

Technical SEO Open-source
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Laravel Redirection

Package for handling complex SEO redirections and domain routing within Laravel applications

GEO & Routing Open-source
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Picfit

An image resizing server written in Go that can use different storage backends like S3 or GCS

Image Optimization & CDN Open-source
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LinkClump

Allows you to open copy or bookmark multiple links at once by dragging a selection box

Browser Tools & Bookmarklets Open-source
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Markdown-lint

CLI tool to ensure SEO-friendly structural integrity for markdown-based content

Content Optimization Open-source
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Image Downloader

Bulk download all images on a page with filtering by size and type

Browser Extensions Open-source
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WhatFont

The easiest way to identify fonts on web pages by simply hovering over the text

Browser Tools & Bookmarklets Open-source
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Linkclump

Drag a box around links to open them all in new tabs or copy them to clipboard

Browser Tools & Bookmarklets Open-source
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Clear Cache

One-click cache and data clearing to test live SEO changes without browser lag.

Browser Tools & Bookmarklets Open-source
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Search-Console-Connector

Python library for easy authentication and data retrieval from the Google Search Console API

Python SEO Libraries Open-source
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Gulp-Favicons

A Gulp plugin that automates the generation of every possible favicon format and HTML tag for your project

Favicon Tools Open-source
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Cloudflare-SEO-Worker

Python scripts for Cloudflare Workers to manage edge SEO tasks and redirects

Python SEO Libraries Open-source
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Check My Links

Link crawler that finds broken links on a webpage to assist in technical SEO cleanup

Browser Tools & Bookmarklets Open-source
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SerpApi Client Libraries

Open-source wrappers for SerpApi across 10+ languages to simplify SEO data integration

API-First SEO Platforms Open-source
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Clear Cache Shortcut

One-click button to clear browser cache and cookies for testing fresh site changes

Browser Tools & Bookmarklets Open-source
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View Rendered Source

Chrome extension to compare raw HTML and rendered DOM for JavaScript SEO troubleshooting

Technical SEO Open-source
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Eye Dropper

Color picker that allows you to pick colors from any webpage or color picker interface

Browser Tools & Bookmarklets Open-source
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Measure-it

Draw a ruler across any webpage to check the dimensions of elements

Browser Extensions Open-source
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Open Multiple URLs

Paste a list of URLs and open them all in new tabs simultaneously

Browser Extensions Open-source
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Beautiful Soup

Library for pulling data out of HTML and XML files for rapid SEO audit script development

Python SEO Libraries Open-source
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Glitch Favicon Generator

Community-driven tool on Glitch for creating animated or dynamic favicons using HTML5 and JS

Favicon Tools Open-source
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HSTS Preload

Security routing tool to manage HSTS headers and domain submission to browser preload lists

Routing & Redirects Free
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Instant Page by WeMakeWebsites

Speeds up Shopify store navigation by pre-loading pages which improves user experience and SEO metrics

Shopify SEO Free
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PHP Graphics Magick

Powerful PHP extension for image manipulation using the GraphicsMagick library

Image Optimization & CDN Open-source
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Payload CMS

Next-generation headless CMS with TypeScript support and extensible SEO configuration hooks

Headless CMS SEO Open-source
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GPT-Crawler

Crawler that crawls websites to generate knowledge files from web content for custom GPTs and LLM training

Technical SEO Open-source
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Kutt

Modern open-source URL shortener with custom domains and analytics routing

Routing & Redirects Open-source
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ScrapeGraphAI

Open-source Python library for scraping search results using Large Language Models

API-First SEO Platforms Open-source
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Bundlephobia

Find the performance cost of adding a npm package to your web application bundles

Technical SEO Open-source
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Perplexica

Advanced AI-powered search engine and open-source Perplexity alternative

AI SEO Open-source
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🔥 Trending

Next.js Sitemap Generator

The go-to package for generating sitemaps automatically within Next.js and Vercel environments

Sitemap Tools Open-source
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Farfalle

Open-source AI search engine and answer engine for local or cloud LLMs

AI SEO Open-source
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Serpbear

Self-hosted open-source search engine rank tracking software

Rank Tracking Open-source
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🔥 Trending

Forwardmail

Privacy-focused open-source service for email and domain forwarding routing

Routing & Redirects Freemium
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Hydration Overlay

Debug tool for identifying hydration mismatches in SSR frameworks like Next.js and Nuxt

JavaScript SEO & Dynamic Rendering Open-source
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Proxy-List

Automated script to fetch and check live proxies for scraping and automation

Proxy Management Open-source
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Statping-ng

Updated self-hosted status page with charts and automated monitoring for apps

Performance & Monitoring Open-source
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SerpBear

Open-source search engine rank tracking software that allows you to track your website rankings for free

Rank Tracking Open-source
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Carbonalyser

Evaluate the environmental impact of your website based on data transfer

Technical SEO Open-source
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LinkExtractor

Open-source Python library for extracting and monitoring backlinks from raw HTML and web crawls

Backlink Analysis Open-source
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OpenPerplex

Open-source AI-powered search engine focused on citations and source transparency

AI SEO Open-source
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Request Indexer

Automated tool to request Google indexing for pages using the Indexing API

Technical SEO Open-source
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Resumes-Parser-SEO

Library focused on extracting SEO-rich entities and semantic keywords from structured documents

Python SEO Libraries Open-source
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TextGenerator

Open-source AI content generation and SEO tool with community-driven team templates

Content Optimization Open-source
📈
🔥 Trending

Serp-Explorer

Open-source rank tracker that scrapes search results without expensive proxies

Rank Tracking Open-source
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🔥 Trending

Auto-SEO-Description-Gen

Uses LLMs to generate meta descriptions and alt text based on page content

AI SEO Open-source
♟️
🔥 Trending

Agentic-SEO

Framework for deploying multi-agent systems to handle technical audits and strategy mapping

AI Strategy Open-source
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LLM-Explorer-Open

Open source framework to test how different prompt structures affect site visibility

AI Visibility Trackers Open-source
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🔥 Trending

SEOEstate

Open-source website crawler and technical SEO analyzer for developers and technical consultants.

Technical SEO Open-source
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🔥 Trending

Zeno

Open-source crawler and SEO toolset for developers built with Node.js

Technical SEO Open-source
🔍
🔥 Trending

Serp-Api-Open

Community project to scrape SERP data for keyword research without costs

Keyword Research Open-source
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🔥 Trending

Markdown-SEO-Linter

Linter for markdown files to ensure correct heading hierarchy and meta data

Content Optimization Open-source
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🔥 Trending

SEOnaut

Comprehensive open-source SEO audit tool for deep site scans

Technical SEO Open-source
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🔥 Trending

Local-SEO-Audit-Tool

Script to compare local business listings across multiple directories for consistency

Local SEO Open-source
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🔥 Trending

Indexing API Tool

Open-source script for bulk-sending URLs to Google’s Indexing API via Google Sheets

Technical SEO Open-source
📊
🔥 Trending

LLM Analytics

Open-source framework to track how LLMs cite and reference website content

GEO Tools Open-source
📊
🔥 Trending

RankTools

Open-source command line tool for monitoring keyword rankings across major engines

Rank Tracking Open-source
📑
🔥 Trending

SEO Dash

Open-source dashboard template for tracking SEO performance across multiple domains

Reporting Open-source
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🔥 Trending

Search Engine Scanner

Fast open-source CLI for scraping search engine results

Open Source Open-source
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🔥 Trending

Serply

Open-source Python library for scraping search engine results for SaaS dev teams

Open Source SEO Open-source
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🔥 Trending

Dalton

Open-source local search rank tracker and citation audit tool for developers and small agencies

Local SEO Open-source
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🔥 Trending

PySEO Keyword Tool

Python-based open source tool for programmatically generating keyword reports and clusters

Keyword Research Open-source
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🔥 Trending

RustySEO

Cross-platform marketing toolkit for deep crawl and server log analysis

Technical SEO Open-source
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Slowpoke

Open-source desktop tool to analyze and visualize website performance over time

Technical SEO Open-source
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🔥 Trending

Internal-Link-Juice-Analyzer

Visualizes internal link flow and calculates PageRank distribution for websites

Internal Linking Open-source
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🔥 Trending

LLM-Visibility-Library

Open-source repository for benchmarking site appearance in various Large Language Models

AI Visibility Trackers Open-source
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🔥 Trending

Favicon-Switcher

Small JS library to switch favicons based on media queries like dark mode or system theme changes

Favicon Tools Open-source
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🔥 Trending

Sa11y

Accessibility checker that focuses on content and provides visual cues for editors within their CMS

Accessibility Testing Tools Open-source
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🔥 Trending

SEO-Writing-Assistant

AI-driven script to generate SEO-friendly content outlines based on top SERP results

Content Optimization Open-source
📊
🔥 Trending

GSC Guardian

Self-hosted dashboard for monitoring Google Search Console health and anomalies

Technical SEO Open-source
🤖
🔥 Trending

SEO Python Library

Open-source library for automating technical SEO tasks like redirect checks and meta analysis

SEO Automation Open-source
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🔥 Trending

Local-LLM-SEO

Open-source scripts for bulk generating localized service pages using Llama 3 or GPT-4

NEW Open-source
💡
🔥 Trending

Answer-The-Public-Scraper

Python script to scrape autocomplete suggestions for "People Also Ask" style research

Keyword Research Open-source
🔥 Trending

Dynamic Favicon

JavaScript library that allows developers to change favicons dynamically based on user status or site notifications

Favicon Tools Open-source
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🔥 Trending

Keywell

Open-source utility for semantic keyword grouping and basic topic modeling for developers

Topic Clustering & Content Planning Open-source
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🔥 Trending

Mobile-Friendly-CLI

Test URLs against mobile-friendly criteria from the command line

Technical SEO Open-source
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🔥 Trending

Site-Audit-CLI

High-performance CLI tool for technical SEO audits and dead link detection

Technical SEO Open-source
🔥 Trending

FastSitemap Generator

Go-based high-performance CLI tool for massive sitemaps, capable of processing 100k URLs per minute

Sitemap Tools Open-source
📦
🔥 Trending

Backlink-Checker

Command-line tool to check backlink status and anchor text from a list of URLs

Backlink Analysis Open-source
🚀
🔥 Trending

Core Web Vitals Visualizer

Visual overlay of CWV metrics directly on the elements of your page

Browser Extensions Open-source
🔍
🔥 Trending

Crux.vis

A clean dashboard for visualizing your domain's historical Chrome User Experience Report data trends

Core Web Vitals Free
🔥 Trending

Ferryman

Open-source tool for handling large-scale e-commerce SEO redirects and path mapping

E-commerce SEO Open-source
📊
🔥 Trending

GSC-Data-Exporter

Python-based CLI for bulk exporting Google Search Console data to CSV

Technical SEO Open-source
🐙
🔥 Trending

Gmerlin

Open-source email verification tool designed for high-speed checking of link building lists

Email Outreach & Prospecting Open-source
🔧
🔥 Trending

Greenflare

Open-source desktop SEO crawler for privacy-conscious technical website audits

Technical SEO Open-source
🗺️
🔥 Trending

Local Search Data

Open-source scraper for extracting local business data from maps

Local SEO Open-source
🦆
🔥 Trending

Mallard Duck

Lightweight open-source eCommerce SEO auditing tool for small online shop owners

eCommerce SEO Open-source
🐍
🔥 Trending

PySEO

Open-source Python framework for custom scheduled SEO crawling and data extraction

Technical SEO Open-source
💻
🔥 Trending

Serpident

Open-source light-weight rank tracker for personal or agency use

Rank Tracking Open-source
🎨
🔥 Trending

Tailwind Icon Generator

Tool to generate favicons based on Tailwind CSS color palettes and utility-first design principles

Favicon Tools Free
🧠
🔥 Trending

Ant-Team Yandex XML Tools

Specialized scripts and tools for managing Yandex XML limits and parsing tasks

Yandex SEO Tools Open-source
🐍
🔥 Trending

Map-Tracker

Open-source python script to track local search rankings on Google Maps via SerpApi

Local SEO Open-source
🐍
🔥 Trending

Naver-SEO-Python

Python scripts for automating Naver Search Advisor tasks and checking indexing status via CLI

Naver SEO Tools Open-source
📐
🔥 Trending

CLS Visualizer

Chrome extension that overlays Cumulative Layout Shift areas directly on your webpage

Core Web Vitals Open-source
🛠️
🔥 Trending

LinkBuildingTools

Open-source repository of scripts and workflows for link prospecting and domain validation

link-acquisition Open-source
🐙
🔥 Trending

SEO.js

Open-source JavaScript library for checking SEO best practices in code

Open Source SEO Open-source
💨
🔥 Trending

Fast Favicon

Lightweight CLI tool for developers to automate favicon generation from a single source image via terminal

Favicon Tools Open-source
🏗️
🔥 Trending

Schema-Writer-AI

AI tool that generates complex localized Schema.org markup for service areas and entities

NEW Open-source
🌈
🔥 Trending

EmojiFavicon

A modern utility to use any standard emoji as your website favicon with zero external assets needed

Favicon Tools Free
🔍
🔥 Trending

Favicon-Audit-CLI

Terminal tool for CI/CD pipelines to ensure all pages in a build have required favicon meta tags

Favicon Tools Open-source
📱
🔥 Trending

AppMockup

Free tool to create professional app store screenshots and assets

Mobile SEO & App Store Optimization Free
🚦
🔥 Trending

WebVitals.dev

Simple testing playground to check how specific code snippets affect Core Web Vitals metrics

Core Web Vitals Free
📉

Grip

Command-line tool for visualizing how GitHub Readmes look, but often used for performance profiling local docs

Core Web Vitals Open-source
📂

Photon

Incredibly fast crawler designed for OSINT and domain profiling

Technical SEO Open-source
🧪

Warp

High-performance edge routing and proxy library built in Rust for ultra-fast redirection

GEO & Routing Open-source

Instant.page

Small script that preloads links on hover to make page navigation feel instantaneous for users

Core Web Vitals Open-source
📝

Markdown to HTML

Convert technical documentation for web deployment with SEO in mind

Technical SEO Open-source
🐳

Logspout

Log routing for Docker containers to stream SEO logs to external analyzers

Log File Analyzers Open-source
🏠

Ackee

Self-hosted privacy-focused analytics tool for developers who care about their own data

Analytics Open-source
📈

Anvaka Sayit

Interactive graph visualization of subreddit relationships to identify niche clusters and link opportunities

Reddit & Forum SEO Tools Open-source
📉

Broken-Link-Checker

Find broken links on websites with this highly configurable CLI tool

Technical SEO Open-source
📉

Webdiff

Python-based command line tool for visually comparing website versions

Change Detection Open-source

Pyppeteer

Python port of Puppeteer for rendering JavaScript-heavy pages for SEO audits

Python SEO Libraries Open-source
🔗

Sitemap.js

High-level sitemap-generating library for Node.js environments to automate large-scale XML generation

Sitemap Tools Open-source
🛠️

YouTube Transcript Extractor

Utility for developers to programmatically pull video transcripts for SEO analysis

Video SEO Open-source
🛠️

PyTrends

Unofficial Python API for Google Trends for automated data collection and analysis

Topic Discovery Open-source
🔥

Speed-Measure-Plugin

CLI performance measurements for build-time SEO impact analysis

Performance Open-source
🕵️

Assetfinder

Find hostnames which may be related to a given domain (part of the tomnomnom suite)

Security & Infrastructure Open-source
📊

Perfume.js

Telemetry library for measuring First Paint, LCP, and FID and reporting them to your analytics

Core Web Vitals Open-source
📦

Staticman

Open-source static site comment engine for building community on JAMstack sites

Content Marketing Platforms Open-source
📦

Bundlewatch

Monitor your app's bundle size in your PRs to ensure performance doesn't degrade over time

Core Web Vitals Open-source
🛠️

BestIcon

A simple favicon service written in Go that can find and proxy favicons for any website with a single API call

Favicon Tools Open-source
🧪

Gevent-SEO-Crawler

High-performance concurrent crawler using gevent for large scale site audits

Python SEO Libraries Open-source
📄

Python-Magic

File type identification for SEO asset audits (images, videos, documents)

Python SEO Libraries Open-source
📉

Yellow Lab Tools

Open-source online test that detects performance smells and front-end code quality issues

Core Web Vitals Open-source
🖼️

Wand

Simple and fast Python library for image processing based on ImageMagick

Image Optimization & CDN Open-source
🌐

Handshake

Decentralized naming protocol for censorship-resistant SEO and domains

Web3 & Blockchain SEO Tools Open-source

Sitemap Generator CLI

Node.js command-line interface tool to generate sitemaps for any website directly from the terminal

Sitemap Tools Open-source
📜

Sitemap-Generator-CLI

Create comprehensive XML sitemaps for large websites from the command line

Technical SEO Open-source
🌐

Expired-Domain-Finder

Searches for expired domains with high authority based on backlink metrics

Domain Analysis Open-source
🕷️

Abot

Open-source crawler for developers to build custom scheduled technical SEO audits

Technical SEO Open-source
📱

Ally.js

Library to help modern web applications with accessibility, focus management, and keyboard navigation

Accessibility Testing Tools Open-source
🔗

Broken Link Checker

Open-source CLI tool to find broken links and server errors across entire domains

Technical SEO Open-source
🏗️

Flyimg

Dockerized PHP application for image resizing, cropping and effects on-the-fly with S3 support

Image Optimization & CDN Open-source
🌍

Langdetect

Port of Google's language-detection library for multilingual SEO site audits

Python SEO Libraries Open-source
🐚

Puppeteer-Renderer

Simple web service to render web pages as HTML or PDF using Puppeteer backend

JavaScript SEO & Dynamic Rendering Open-source
🚀

Scrapy-Selenium

Middleware for Scrapy to handle JavaScript pages using Selenium for SEO

Python SEO Libraries Open-source
🏗️

Static Jinja

Open-source library to build static websites with Jinja2 templates

Technical SEO Open-source
📉

SEO-Analyzer

Python script to analyze a website for SEO issues like broken links and missing meta tags

Python SEO Libraries Open-source
📦

Node-SEO

SEO analysis tool for Node.js projects to check content and metadata

Technical SEO Open-source
📝

Text-Summarizer

AI-powered tool to generate SEO meta descriptions and summaries from content

Content Optimization Open-source
🖼️

Image-Optimizer-SEO

Batch processes and compresses images for web while maintaining SEO metadata

Performance Open-source
🌍

Waybackpy

Python wrapper for the Wayback Machine API to track historical SEO changes

Python SEO Libraries Open-source
🧪

Favicon Grabber

Open-source API and tool to extract the highest resolution favicon from any website URL for competitive research

Favicon Tools Open-source
📊

PageXray

Analyze web page requests and resource sizes to optimize performance

Browser Extensions Open-source

Anchor Image

Lightweight image server for self-hosting with built-in on-the-fly resizing and cropping

Image Optimization & CDN Open-source
🎯

LinkSource

Open-source link prospect management tool for organizing potential domains and tracking contact status

Link Building Open-source
📱

MobiMetrics

Open-source script collection for basic mobile rank tracking

Mobile SEO & App Store Optimization Open-source
🤖

PDF-XRay

Python-based tool for extracting and analyzing PDF structures to identify SEO issues or hidden data

PDF & Document SEO Open-source
🤖

Robots-Parser-CLI

Test and validate robots.txt rules against specific URLs via terminal

Technical SEO Open-source
📊

SEO Mapper

Open-source tool to visualize internal linking and site architecture

Data SEO Open-source
🐙

SEO-Checker

Node.js based open source SEO checker for developers

Open Source SEO Open-source
🛠️

SEO-Go

Lightweight open-source CLI for checking meta tags and broken links

SEO Automation Open-source
🪵

SEO-Log-Analyzer

A Python script to parse and analyze server logs specifically for SEO bot behavior

Log Analysis Open-source
🧠

Screaming Frog to LLM

A Python script bridging Screaming Frog export data with OpenAI for automated technical SEO recommendations

AI & Automation Open-source
🗺️

Sitemap Generator

Open-source tool to generate massive XML sitemaps for enterprise eCommerce catalogs

eCommerce SEO Open-source
🧪

Sitemapper

High-performance open-source sitemap generator and validator for large-scale enterprise web architectures

Technical SEO Open-source
📦

Taudio

Open-source repository for audio processing and metadata extraction for SEO

Podcast SEO & Optimization Open-source
🤖

Text-to-JSON Schema

Open source utility to convert unstructured text into valid Schema.org JSON-LD snippets

Content Optimization Open-source
🔍

Ubersuggest-Open

Community maintained scraper for keyword suggestions and search volume data

Keyword Research Open-source
🗺️

Ultimate Sitemap Parser

Robust Python sitemap parser to extract URLs and detect errors in XML sitemap files

Python SEO Libraries Open-source
💬

YouTube Comment Suite

Open-source tool for managing and analyzing thousands of YouTube video comments

Video SEO Open-source
🧪

Content-Auditor

Open-source Python script for analyzing site-wide content quality and planning updates

Content Strategy & Planning Open-source
📦

Icon-Gen

Multi-platform CLI that converts SVG or PNG to icons for web Windows macOS and Linux in one command

Favicon Tools Open-source
📝

Hemingway-Open

Open-source implementation of writing analysis for readability and SEO

Content Optimization Open-source
🔎

Whois-Python

Python library to retrieve WHOIS information for domain age and expiration tracking

Python SEO Libraries Open-source
🔧

Font-Style-Matcher

Tool to help align fallback fonts with web fonts to reduce Cumulative Layout Shift (CLS)

Core Web Vitals Free
📦

SEO-Scraper-JS

High-performance Javascript scraper designed to extract SEO metrics and meta data from large batches of URLs

AI & Automation Open-source
🔍

Serp-Api (Open Source)

Self-hosted SERP scraping API using Puppeteer and Node.js for private data pipelines

API-First SEO Platforms Open-source
🔧

Site-Crawler

Fast multi-threaded web crawler for site mapping and technical audits

Technical SEO Open-source
🔎

Wordsmith

An open-source script alternative for Google Sheets to handle bulk keyword research and SERP analysis via API

Google Sheets SEO Add-ons Open-source
🌍

Geo-IP-CLI

Check server location and IP data to optimize international SEO hosting

Technical SEO Open-source
🔍

Hreflang-Checker

Automated validation of hreflang tags across international website versions

Technical SEO Open-source
🐍

PySitemap

Python library for creating high-performance sitemap crawlers and generators for custom web apps

Sitemap Tools Open-source
📄

Quick Source Viewer

A refined view of the page source with syntax highlighting and resource grouping

Browser Tools & Bookmarklets Open-source
🔍

Search-Console-CLI

Quickly query Google Search Console data directly from your terminal

Technical SEO Open-source
🗺️

Sitemap-Validator

CLI utility to validate XML sitemaps against XSD schemas and link health

Technical SEO Open-source
🌊

Imager

Simple and lightweight image manipulation library for PHP with a focus on ease of use

Image Optimization & CDN Open-source

SEO-Lint

Linter for SEO to validate meta tags and structural elements on HTML files

Technical SEO Open-source
📋

Validator-Collection

Collection of Python validation functions for checking URL and email formats

Python SEO Libraries Open-source
🧩

Extensions Manager

Toggle browser extensions on and off quickly to avoid memory bloat and conflicts

Browser Tools & Bookmarklets Open-source
🗂️

JSON-LD-Gen

Command-line utility for generating complex structured data scripts

Technical SEO Open-source
🧩

Canonical-Audit-Tool

Identifies canonical tag mismatches and loops across large site architectures

Technical SEO Open-source
📋

Copy All URLs

Quickly copy all open tab URLs to the clipboard in multiple formats for research sharing

Browser Tools & Bookmarklets Open-source
🚀

Static-Site-SEO-Checker

Validation tool for meta tags and structure in static site generators like Jekyll

Technical SEO Open-source
📊

Google Sheets Sitemap Maker

Custom script template to crawl URLs from a Google Sheet and generate a valid XML sitemap file

Sitemap Tools Open-source
⏱️

Page Load Time

Minimalist extension that displays the exact loading time of a webpage in the browser toolbar

Browser Tools & Bookmarklets Open-source
🚀

Static Site Checker

Audit tool for static site generators and JAMstack SEO

Technical SEO Open-source
🏃

Stet

Open-source privacy-first website analytics server designed for high-performance self-hosting

Analytics Open-source
🏗️

Alt Text Tester

Hover over images to see their alt text and identify missing attributes for accessibility

Browser Tools & Bookmarklets Open-source
🔗

Link Grabber

Extracts all links from a webpage and displays them in a sortable list

Technical SEO Open-source
🔍

SEO Keyword Research Tool

Python-based keyword suggestion tool utilizing Google Autocomplete

Keyword Research Open-source
🔗

Link-Stats-CLI

Extract and categorize all internal and external links from a page

Technical SEO Open-source
⚙️

Local-SEO-Checklist

GitHub repository containing a comprehensive technical checklist for optimizing local business websites

Technical SEO Open-source

A11ygator

Web tool and API that analyzes a page and provides a clear list of accessibility improvements

Accessibility Testing Tools Free
📦

Delta

Simple desktop app to monitor web elements and get native notifications

Change Detection Free
🛠️

Dynamic-Favicon-JS

Lightweight vanilla JS script to update favicon badges with numbers for real-time notifications

Favicon Tools Open-source
📂

Folder2Sitemap

Simple utility for developers that converts a local folder structure into a valid XML sitemap

Sitemap Tools Open-source
🛠️

Go-SEOSpider

CLI-based website crawler written in Go for high-speed technical SEO audits

API-First SEO Platforms Open-source
🤖

Kvext

Python library for extracting keywords and entities from podcast transcripts

Podcast SEO & Optimization Open-source
📦

NAP Hunter

Chrome extension to search for Name, Address, and Phone inconsistencies across the web

Local SEO Open-source
📦

NapHunter

Open-source script for finding NAP inconsistencies for local SEO audits

Local SEO Open-source
🔍

SSEO

Open source technical SEO analyzer for identifying onsite optimizations

Technical SEO Open-source
🦴

Skeleton

Open-source crawler for identifying broken links and SEO issues in a CLI environment

Technical SEO Open-source
⏱️

Tighthouse

Terminal-based Lighthouse runner for quick bulk performance audits

Performance Open-source
🖼️

View Image Info

Extracts image metadata including alt text, file size, and dimensions directly from the browser.

Browser Tools & Bookmarklets Open-source
🏛️

Wiki-Audit Tool

Open-source script for checking Wikipedia and Wikidata mentions to audit brand authority

GEO & AI Audits Open-source
🔑

Keywords-CLI

Extract keyword density and frequency from HTML documents via terminal

Technical SEO Open-source
🦖

Dino

Simple CLI for checking status codes and broken links on small to medium sites

Technical SEO Open-source
🛠️

F12 - Website Analyzer

Inspect headers cookies and scripts in a single simplified view

Browser Extensions Open-source
📦

Favicon-Fetch

Node.js package that efficiently finds and downloads the best quality favicon for any given URL

Favicon Tools Open-source
🔗

Link-Context-Parser

A specialized tool for analyzing the surrounding text and semantic context of internal and external backlinks

Content Optimization Open-source
🏠

Local-SEO-Schema-CLI

Generate local business schema markup via terminal for multiple locations

Technical SEO Open-source
🧪

Hreflang-Checker-CLI

Validate hreflang tags across international sites via command line

Technical SEO Open-source
📊

WordCounter

Quickly count words and characters of selected text on any webpage

Content Optimization Open-source
🗄️

Header-Checker

Bulk check HTTP response headers for large lists of SEO landing pages

Technical SEO Open-source
💡

Keyword Researcher Python

Tool to generate bulk keyword ideas from Google suggestion APIs

Keyword Research Open-source
🐍

PyBacklinkCheck

Python library to check if a backlink exists on a specific page programmatically

Backlink Analysis Open-source
🔧

Request Map

Tool that visualizes third-party requests and their impact on site performance and load times

Core Web Vitals Free
🤖

SEO-CLI

Node.js CLI for linting on-page SEO elements like title, meta, and headers

Content Optimization Open-source
🛠️

Screaming Frog to Sheets

A custom AppsScript for pushing Screaming Frog crawl data automatically to Google Sheets

Technical SEO Open-source
🛡️

Security-Headers-CLI

Quickly check security headers that impact SEO and site trust

Technical SEO Open-source
📋

Simple URL Copy

One-click to copy current URL or all URLs from a window with clean formatting

Browser Tools & Bookmarklets Open-source
🔍

Suckless SEO Checker

Ultra-minimalist CLI tool for checking basic on-page SEO factors

Technical SEO Open-source
🐍

Yandex Search Result Scraper

Python library to scrape and parse Yandex search engine results pages effectively

Yandex SEO Tools Open-source
📊

PageSizer

Check the uncompressed size of a webpage including all assets

Browser Extensions Open-source
🔍

Landmark Navigator

Chrome extension that allows users to quickly navigate between ARIA landmarks on a page

Accessibility Testing Tools Free
📱

Android Adaptive Icon Generator

Specific tool for creating the multi-layered adaptive icons required for modern Android device launchers

Favicon Tools Free
🚦

Crawl-Delay-CLI

Analyze crawl budget and server response times via command line

Technical SEO Open-source
📝

HARO SEO Filters

Open-source script to filter HARO emails for high-relevance link opportunities

Link Building Open-source
🛰️

Rank-CLI

Lightweight command line tool to check ranking of a domain for specific keywords

Rank Tracking Open-source
📦

hreflang-php

Lightweight PHP library for generating and managing SEO-compliant hreflang HTML tags in backend applications

International SEO & Hreflang Management Open-source
📂

Google Drive Sitemap Scraper

Script that scrapes URLs from lists in Google Drive to perform status code checks

Technical SEO Open-source
📱

AppSnippetPreview

Preview tool for app store search result snippets

Mobile SEO & App Store Optimization Free
🧪

Favicon Grabber API

Fast and reliable JSON API to retrieve a website's favicon and touch icons for use in applications

Favicon Tools Open-source
🏠

Home SEO Bookmarklet

One-click bookmarklet to check on-page elements social tags and image assets

Browser Tools & Bookmarklets Free
🔗

Linked Data Lexicon

Resource for mapping semantic web terms to schema.org types for advanced knowledge graphs

Schema Markup & Structured Data Free
🛠️

Logwatch

Customizable log analysis system which parses system logs and sends reports

Log File Analyzers Open-source