Bookmarklet Resources

Master the art of creating powerful JavaScript bookmarklets. From basic concepts to advanced techniques.

Getting Started

1

Understand the Basics

Discover what bookmarklets are, how they work, and why they're useful for web automation.

2

Try the Generator

Use our bookmarklet generator to convert JavaScript code into working bookmarklets.

Open Generator →

3

Inspect the Source

Decode a bookmarklet and flag the browser capabilities that deserve manual review without running it.

Open Inspector →

4

Test DOM Behavior

Run code you understand in a disposable local document that restricts page-origin access, requests, external resources, forms, popups, and downloads.

Open Test Fixture →

Resource Guides

What is a Bookmarklet?

Learn the basics of bookmarklets and how they work

How to Create a Bookmarklet

Step-by-step guide to building your first bookmarklet from scratch

Useful Bookmarklets for Developers

20+ practical bookmarklets every developer should know

Bookmarklet Security

Understand page-origin access, browser limits, network risk, and source-review steps

Bookmarklets vs Extensions

Compare bookmarklets with browser extensions to choose the right tool

JavaScript Bookmarklet Tutorial

Learn JavaScript programming through practical bookmarklet examples

Social Media Bookmarklets

Automate social media posting and engagement with smart bookmarklets

Debug Websites with Bookmarklets

Powerful debugging tools for web development and testing

Bookmarklet URL Encoding

Master URL encoding, special characters, and length limitations

Advanced Bookmarklet Techniques

Async/await, dynamic imports, and advanced JavaScript patterns

Bookmarklet Compatibility

Cross-browser compatibility and mobile support strategies

Code Examples

Highlight All Links

Learn to select and modify DOM elements

// Highlight all links on the page
const links = document.querySelectorAll('a');
links.forEach(link => {
  link.style.backgroundColor = 'yellow';
  link.style.padding = '2px';
});

Count Page Headings

Read document structure without collecting personal data

// Count headings by level
const counts = {};
document.querySelectorAll('h1,h2,h3,h4,h5,h6').forEach((heading) => {
  counts[heading.tagName] = (counts[heading.tagName] || 0) + 1;
});
console.table(counts);

Create Quick Notes

Add interactive elements to any webpage

// Add a floating note widget
const noteDiv = document.createElement('div');
noteDiv.innerHTML = '<textarea placeholder="Quick note..."></textarea>';
noteDiv.style.cssText = 'position:fixed;top:10px;right:10px;z-index:9999;';
document.body.appendChild(noteDiv);

Need Help?

📚 Documentation

Comprehensive guides and API references for all your bookmarklet needs.

💡 Examples

Browse our library of working bookmarklets for inspiration and reference.

🛠️ Tools

Use the generator, inspector, and isolated fixture to create, review, and test bookmarklets.