Browser Tools & Bookmarklets Tools
Browse Browser Tools & Bookmarklets tools. Apply filters to refine results.
⭐ Featured Browser Tools & Bookmarklets Tools
JSONView
Formats and validates JSON responses in the browser for easier API and structured data debugging
AMP Browser Extension
Instantly validates Accelerated Mobile Pages and provides real-time debugging for web developers
Dark Reader
Enables dark mode for every website to reduce eye strain during long SEO audit sessions
All Browser Tools & Bookmarklets Tools
Showing 75 tools
Core Web Vitals Overlay
Visualizes LCP FID and CLS metrics directly on the page for real-time performance tuning
Detailed SEO Extension
Professional SEO extension providing instant insights into metadata schema markup and headers
HARPA AI
AI-powered automation for web monitoring data extraction and ChatGPT integration in browser
KeySearch Starter
A browser-based keyword tool for identifying low competition niches and related search terms
Koala Inspector
Spy on Shopify stores to see used themes apps and newest products for e-commerce SEO
Mobile Simulator
Test your website responsive design across dozens of mobile devices and tablet screen sizes
Open Graph Preview
Visualizes how your website will appear on social media platforms like Facebook and Twitter
SEO Search Simulator
Simulates Google searches from any location in the world to check local rank and results
Schema Builder
Point-and-click tool to generate complex JSON-LD schema markup without writing code
AMP Browser Extension
Instantly validates Accelerated Mobile Pages and provides real-time debugging for web developers
Dark Reader
Enables dark mode for every website to reduce eye strain during long SEO audit sessions
Wappalyzer
Identify web technologies on websites including CMS frameworks and payment processors
Ghostery
Privacy extension that shows trackers and allows you to block them to see page speed impact
Dimensions
A tool for designers to measure screen dimensions in the browser for pixel perfect layouts
JSONView
Formats and validates JSON responses in the browser for easier API and structured data debugging
EditThisCookie
Manage cookies for SEO testing including location spoofing and session management.
Tab Manager Plus
Efficiently manage hundreds of tabs with search filter and deduplication features
LinkClump
Allows you to open copy or bookmark multiple links at once by dragging a selection box
CSP Evaluator
Evaluates Content Security Policies to detect bypasses and improve site security
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
Clear Cache
One-click cache and data clearing to test live SEO changes without browser lag.
Check My Links
Link crawler that finds broken links on a webpage to assist in technical SEO cleanup
Clear Cache Shortcut
One-click button to clear browser cache and cookies for testing fresh site changes
Eye Dropper
Color picker that allows you to pick colors from any webpage or color picker interface
A/B Trend Checker
Calculates statistical significance for A/B testing directly within your browser session
Ahrefs SEO Toolbar
On-page SEO report broken link checker and link metrics for visited pages
Ayima Page Insights
Highlight on-page SEO issues directly on the page including hidden content and alt text.
BuiltWith Technology Profiler
Displays all technologies used on a site including tracking pixels and hosting providers
BuzzSumo Extension
Find the most shared content and top influencers for any website or keyword search
ColorZilla
Advanced eyedropper and color picker for analyzing website color schemes for design and SEO
Da Vinci Tools
Enhances Google Analytics and GTM with high-level visualizations and usability features.
Data Miner
Scrape data from any website into Google Sheets or Excel with one click
Fonts Ninja
Identify fonts used on any website and inspect CSS properties like size and spacing
Full Page Screen Capture
Capture high-resolution full-page screenshots of entire websites with one click
Google Optimize (Legacy Check)
Visual editor for A/B testing although sunsetted many bookmarklets still use its logic
Hunter - Email Finder
Find email addresses associated with the website you are visiting for outreach campaigns
LastPass
Secure password manager for managing multiple SEO tool accounts and client logins
Link Miner
Checks for broken links and pulls backlink metrics from Ahrefs or Moz for link building
Link Redirect Trace
The "all-in-one" redirect path analyzer that covers headers rel-canonicals and more
LinkResearchTools Toolbar
Evaluates link power and trust indicators directly in your browser while browsing
Meta SEO Inspector
Inspects metadata and microdata for errors and compliance with search engine guidelines
MozBar
SEO toolbar that provides instant metrics like Domain Authority and Page Authority
OAuth 2.0 Playground
Test and debug OAuth 2.0 APIs for Google Search Console and Analytics integrations.
Open SEO Stats
Shows web rank and SEO stats for the current page including backlinks and indexed pages
Portent's SEO Page Review
Review meta data and on-page content relevance with a focus on marketing intent
Robots Exclusion Checker
Visual indicator of robots.txt and meta-robots directives to prevent accidental deindexing.
Session Buddy
Unified session and tab manager to save and export groups of SEO research tabs
SimilarWeb Extension
Provides website traffic statistics and engagement metrics for competitive benchmarking
Structured Data Testing Tool
Validator for Schema.org and JSON-LD markup that simulates Google's rich results
Tag Assistant Legacy
Troubleshoot installation of various Google tags including Google Analytics and Ads
Ubersuggest Extension
Keyword volume and backlink data directly on Google YouTube and Amazon results
VPN Proxy Master
Switch locations to see localized SERP results and test regional SEO performance
Web Developer Overlay
Adds a toolbar to the browser with various web developer tools for accessibility and SEO testing
Check My Headers
Detailed view of HTTP response headers to verify security policies and caching rules
Fast SEO Link Checker
Lightning fast checker for links and redirects specifically for affiliate marketers
Sitemap Navigator
Browser-based tool to quickly parse and navigate XML sitemaps for deep site analysis
Whois Freak
Check domain ownership and registration history directly from the browser bar.
Quick Source Viewer
A refined view of the page source with syntax highlighting and resource grouping
Extensions Manager
Toggle browser extensions on and off quickly to avoid memory bloat and conflicts
Copy All URLs
Quickly copy all open tab URLs to the clipboard in multiple formats for research sharing
Page Load Time
Minimalist extension that displays the exact loading time of a webpage in the browser toolbar
Alt Text Tester
Hover over images to see their alt text and identify missing attributes for accessibility
View Image Info
Extracts image metadata including alt text, file size, and dimensions directly from the browser.
Word Counter Plus
Simple tool to count words and characters in selected text on any web page
NoFollow Simple
Highlights all nofollow and sponsored links on a page to visualize internal link equity
Simple URL Copy
One-click to copy current URL or all URLs from a window with clean formatting
FontScanner
Detects and lists all fonts used on a website along with their CSS properties and sizes
Google Search Results Preview
See how your page title and meta description will look in Google before you publish
Home SEO Bookmarklet
One-click bookmarklet to check on-page elements social tags and image assets
Note Anywhere
Add virtual sticky notes to any web page that persist when you return to the URL
Note Board
Sticky notes for websites that stay pinned to the URL for research and audit notes
Responsive Design Checker
Test how your site responds to different screen resolutions and standard device sizes
Robot.txt Viewer
Quickly view and validate robots.txt files with syntax highlighting for better site crawling
Web Developer Checklist
Interactive checklist of best practices for SEO mobile performance and security compliance