Code Minifier & Beautifier
Minify code for production or beautify messy code for debugging. JavaScript, CSS, and HTML — all in one tool, all in your browser.
The Problem We Solve
- AI chatbots hallucinate code formatting — adding wrong syntax or breaking valid code
- Switching between 3 different tools for JS, CSS, and HTML formatting wastes time
- Online formatters either require signup or have daily usage limits
- Minified production code is unreadable when debugging errors
- No quick way to compare original vs minified file size
Our Solution
- Deterministic formatting engine — always produces correct, predictable output
- All 3 languages in one tool — JavaScript, CSS, HTML with one click
- Bidirectional: minify for production, beautify for debugging
- Real-time size comparison with compression percentage
- 100% private browser processing — your code never leaves your device
Input JavaScript
Output
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Original Size (bytes)
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Output Size (bytes)
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Minified Size (bytes)
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Compression
Frequently Asked Questions
How is this different from AI chatbots?
AI chatbots often "hallucinate" code — they may add incorrect syntax, rename variables, or change behavior. This tool uses deterministic engines (js-beautify for formatting and precise string algorithms for minification) that always produce correct, predictable output without changing your code's meaning.
Is my code sent to a server?
No. All processing happens entirely in your browser using the js-beautify library loaded from CDN. Your code never leaves your device, making this completely private and secure for proprietary or sensitive source code.
Which languages are supported?
The tool supports JavaScript (including JSX/ES6+), CSS (including media queries and keyframes), and HTML. Both beautification (formatting with proper indentation) and minification (removing whitespace and comments) are available for all three languages.
How much can minification reduce file size?
Typical reduction: JavaScript 25-50%, CSS 20-40%, HTML 15-30%. The exact savings depend on how much whitespace and comments your code has. Minified CSS with many comments can see 50%+ reduction. Our tool shows the actual byte savings and compression percentage in real-time.
Can I use this for production builds?
Yes. The minification output is safe for production use. For JavaScript, we remove whitespace and comments without changing behavior. For CSS and HTML, we produce standards-compliant minified output. However, for large projects, consider using dedicated build tools like Terser (JS), cssnano (CSS), or html-minifier-terser (HTML) for deeper optimization.