Bookmarklets are tiny JavaScript snippets saved as browser bookmarks. No extensions, no installs, one click to run. Here are 63 of the best for developers, organized by category.
SEO Bookmarklets #
These tools help you audit and optimize pages for search engines.
- Check AMP Version - Verify if a page uses AMP
- Check Broken Links - Find dead links on any page
- Check Canonical Tags - Verify canonical URL implementation
- Check Hreflang Tags - Validate international targeting tags
- Check Image Optimization - Audit image sizes and alt text
- Check Indexing Status - Quick Google index check
- Check Meta Description - View and analyze meta descriptions
- Check Mobile Viewport - Verify mobile-friendly setup
- Check Open Graph Tags - Inspect social sharing metadata
- Check Page Speed - Redirect to PageSpeed Insights
- Check SSL Certificate - View SSL certificate details
- Check Structured Data - Validate schema markup
- Check Twitter Cards - Verify Twitter card metadata
- Check XML Sitemap - View the sitemap
- Convert Links to Hrefs - Convert text URLs to clickable links
- Google Site Search - Search within a specific domain
- Google Trends Checker - Check search trend data
- Highlight Headings - Color-code H1 through H6 tags
- Heading Hierarchy Map - Visual tree of page heading structure
- Keyword Density Analyzer - Count keyword frequency
- Moz DA Checker - Look up domain authority
- Readability Checker - Score content readability
- Robots.txt Checker - View robots.txt rules
- Schema Markup Validator - Validate structured data
- SEO Keyword Highlighter - Highlight keywords on the page
Web Development Bookmarklets #
Tools for debugging, inspecting, and testing web pages.
- Clear Local Storage - Wipe localStorage for the domain
- Clear Session Storage - Wipe sessionStorage for the domain
- Cookie Inspector - View all cookies for the page
- CSS Class Inspector - Show CSS classes on elements
- CSS Grid Overlay - Display a grid overlay on the page
- Element Counter - Count elements by tag type
- Event Listener Viewer - See attached event listeners
- Extract Stylesheets - List all linked stylesheets
- Font Inspector - Identify fonts used on the page
- Local Storage Explorer - Browse localStorage contents
- Remove Colors - Strip all colors for accessibility testing
- Remove Stylesheets - Strip CSS to view raw HTML
- Toggle Element Visibility - Show/hide hidden elements
- Unused CSS Detector - Find unused CSS rules
- Live Webpage Editor - Edit page content directly in browser
Design Bookmarklets #
Quick design inspection and color tools.
- Color Palette Extractor - Extract dominant colors from a page
- Color Picker - Pick any color on screen
- Dark Mode Toggle - Force dark mode on any website
Productivity Bookmarklets #
Speed up your daily workflow.
- Add to Feedly - Subscribe to a feed in Feedly
- AI Summarizer - Extract key points from any article
- Markdown Link Copier - Copy page as Markdown link
- Open in daily.dev - Open page in daily.dev
- Post to Hacker News - Submit page to HN
- Quick Rich Text Editor - Turn any textarea into a rich editor
- Read Aloud (TTS) - Listen to page content via text-to-speech
- Remove Embed iframe - Strip iframes from the page
- Remove Images - Remove all images for faster loading
- Sticky Header Killer - Remove fixed headers and nav bars
- Word Counter - Count words in selected text
Privacy Bookmarklets #
Control your data and cookies.
- Delete Cookies - Clear all cookies for the domain
Fun Bookmarklets #
- Enable Right Click - Re-enable right-click on pages that block it
- Highlight Links - Highlight all links on the page
- Let it Snow - Make it snow on any webpage
- Quick Google Translate - Translate the page with Google
- Quick Note - Jot down a quick note
- Quick Online Note - Floating notepad on any page
- URL to QR Code - Generate a QR code for the current URL
- Wayback Machine Search - View archived versions of the page
How to Use Bookmarklets #
Drag any button to your bookmarks bar. Click it on any webpage to run. That's it.
Bookmarklets work in all modern browsers: Chrome, Firefox, Safari, and Edge. No installation required, no permissions needed, no data collected.
Looking to build your own? Check our Bookmarklet Maker to create custom bookmarklets from JavaScript code.
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