CyberMark - Really Cool Bookmarklet Forge

Code Editor

Bookmarklet Name

Minify IIFE Encode

JavaScript Code

Note: This tool does not validate your code. Please ensure your script works correctly before generating.

External Scripts

External Styles

Generated Output

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CyberScript

Bookmarklet Code

Original

0 bytes

Compressed

0 bytes

Reduction

Usage Guide

Quick Start

Write JavaScript that executes on click:

alert('Hello World!');
document.body.style.filter = 'invert(1)';

DOM Manipulation

Modify the current page:

[...document.images].forEach(img => 
  img.remove()
);

document.querySelectorAll('a')
  .forEach(a => {
    a.style.background = '#3b82f6';
    a.style.color = 'white';
  });

External Resources

Load scripts/styles with !loadOnce prefix:

!loadOnce https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js

Advanced Features

▸ Auto-minification for smaller size
▸ IIFE wrapping prevents conflicts
▸ URI encoding for compatibility
▸ Duplicate resource prevention

Pro Tips

✓ Keep code under 2000 chars
✓ Test on target sites first
✓ Use const/let over var
✓ Avoid global pollution