CyberMark

Really Cool Bookmarklet Forge

Crafted by notalex.sh

Code Editor

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

Generated Output

Drag this button to your bookmarks bar:

CyberScript

Original

0 bytes

Compressed

0 bytes

Reduction

0%

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
Code copied to clipboard