Code Minifier & Beautifier
Minify JavaScript, CSS & HTML to reduce file sizes, or beautify messy code with proper indentation. Fast, free, and completely private.
editInput (JAVASCRIPT)
outputOutput
How to Minify JavaScript Online
1. Paste Your Code
Select JavaScript, CSS, or HTML from the language tabs and paste your source code into the input panel.
2. Click Minify or Beautify
Hit Minify to compress your code by removing comments, whitespace, and unnecessary characters. Or Beautify to format it.
3. Copy the Result
Copy your optimized code to the clipboard with one click and use it in your projects. Check the stats for size savings.
CSS Minification: Reduce Stylesheet File Size
CSS minification removes all unnecessary characters from your stylesheets without changing their functionality. This includes stripping comments, eliminating whitespace between rules, removing the last semicolon before closing braces, and collapsing redundant spaces. Minified CSS loads faster, reduces bandwidth consumption, and improves your website's Core Web Vitals scores. Our tool handles media queries, keyframe animations, and complex selectors while preserving the exact same visual output.
HTML Beautifier: Format Messy Markup
The HTML beautifier takes compressed or poorly indented HTML and reformats it with consistent indentation, making it easy to read, debug, and maintain. It properly nests tags, recognizes void elements like <img>, <br>, and <input> that don't need closing tags, and handles self-closing tags correctly. Choose between 2-space or 4-space indentation to match your team's coding standards.
Why Minify Your Code?
speedFaster Page Load Times
Smaller files download faster, reducing Time to First Byte (TTFB) and improving user experience, especially on mobile networks.
savingsLower Bandwidth Costs
Minified assets consume less bandwidth. For high-traffic sites, this translates to significant hosting cost savings over time.
trending_upBetter SEO Rankings
Google uses page speed as a ranking factor. Minified code contributes to better Core Web Vitals and higher search result positions.
securityPrivacy First Processing
All minification and beautification happens entirely in your browser. Your code is never uploaded to any server or stored anywhere.
Frequently Asked Questions
What is code minification?
Code minification is the process of removing all unnecessary characters from source code without changing its functionality. This includes whitespace, line breaks, comments, and sometimes shortening variable names. The result is a smaller file that browsers can parse and execute identically to the original.
Is it safe to minify my code here?
Absolutely. This tool runs 100% in your browser using client-side JavaScript. Your code is never sent to any server, stored in any database, or shared with any third party. You can verify this by checking your browser's network tab while using the tool.
What is the difference between minification and beautification?
Minification compresses code by removing unnecessary characters to create the smallest possible file. Beautification (also called prettifying or formatting) does the opposite: it adds proper indentation, line breaks, and spacing to make code human-readable. Both operations preserve the code's functionality.
How much can I save by minifying JavaScript?
Typical savings range from 20% to 60% depending on how much whitespace, comments, and formatting your original code contains. Well-commented code with consistent indentation will see larger savings. Combined with gzip compression on your server, total size reduction can exceed 80%.
Does this tool use an AST parser for JavaScript minification?
This tool uses regex-based minification for fast, client-side processing. It removes comments, collapses whitespace, and strips unnecessary characters. For production builds of large applications, consider AST-based tools like Terser or esbuild that can also perform dead code elimination and variable renaming.
Can I minify CSS with media queries and keyframes?
Yes. The CSS minifier handles all standard CSS syntax including media queries, keyframe animations, custom properties (CSS variables), pseudo-classes, and complex selectors. It removes comments and whitespace while preserving the meaning and functionality of every rule.
What indent size should I use for beautifying?
Both 2-space and 4-space indentation are widely used. Many JavaScript and React projects use 2 spaces (this is the default in tools like Prettier). Python and some enterprise codebases prefer 4 spaces. Choose whatever matches your project's style guide or personal preference.