Professional-Grade Code Optimization Tool | Reduce File Sizes by Up to 95%
Code compression and minification is the process of removing unnecessary characters, whitespace, and comments from source code without changing its functionality. This advanced technique reduces file sizes, improves website loading speeds, and optimizes bandwidth usage. Our professional-grade compressor supports JavaScript, CSS, HTML, and JSON with industry-leading compression ratios.
Process thousands of lines of code in milliseconds with our optimized compression algorithms. Built on Terser, the industry-standard JavaScript minifier.
All compression happens locally in your browser. Your code never leaves your device, ensuring complete privacy and security for proprietary source code.
Compress JavaScript, CSS, HTML, and JSON files with specialized algorithms optimized for each language's syntax and structure.
Variable name mangling, dead code elimination, function inlining, and constant folding for maximum compression without breaking functionality.
Real-time compression statistics showing original size, compressed size, percentage reduction, and total bytes saved for performance tracking.
Download compressed code instantly or copy to clipboard with one click. Compatible with all build systems and deployment pipelines.
Code compression is essential for modern web development. Smaller file sizes mean faster page loads, reduced bandwidth costs, and improved user experience. Studies show that a 1-second delay in page load time can reduce conversions by 7%. Here's why compression matters:
| Metric | Uncompressed | Compressed | Improvement |
|---|---|---|---|
| File Size | 250 KB | 45 KB | 82% Reduction |
| Load Time (3G) | 8.5 seconds | 1.5 seconds | 7 seconds faster |
| Bandwidth Cost | $50/month | $9/month | $41 saved |
| Parse Time | 245ms | 42ms | 83% faster |
JavaScript Compression: Our tool uses Terser, the most advanced JavaScript minifier available. It performs dead code elimination, removes unreachable code, inlines single-use functions, evaluates constant expressions, and mangles variable names to single characters while preserving all functionality.
CSS Optimization: The CSS compressor removes all unnecessary whitespace, combines duplicate selectors, shortens color codes (e.g., #ffffff to #fff), removes empty rulesets, and optimizes font declarations. It maintains specificity and cascade order.
HTML Minification: HTML compression removes comments, collapses whitespace between tags, removes optional closing tags, minifies inline CSS and JavaScript, and preserves content structure while reducing file size dramatically.
JSON Optimization: JSON files are compressed by removing all whitespace while maintaining valid JSON structure. This is crucial for API responses and configuration files where bandwidth matters.
Eliminates spaces, tabs, and line breaks that don't affect code execution. This alone can reduce file sizes by 20-40%.
Removes all comments from source code, including single-line, multi-line, and documentation comments that aren't needed in production.
Renames long variable and function names to short identifiers (a, b, c) while preserving scope and preventing name collisions.
Identifies and removes unreachable code, unused variables, and functions that are never called, reducing bundle size significantly.
Evaluates constant expressions at compile time (e.g., 2 + 3 becomes 5) to reduce runtime computation and file size.
Converts bracket notation to dot notation where possible and optimizes property access patterns for better compression.
1. Always Test After Compression: While our tool preserves functionality, always test compressed code in your development environment before deploying to production.
2. Keep Source Maps: Generate source maps for debugging. They allow you to debug minified code by mapping it back to the original source.
3. Compress Before Deployment: Integrate compression into your build pipeline. Use tools like Webpack, Gulp, or Grunt to automate minification.
4. Use Gzip Compression: Combine code minification with server-side Gzip compression for maximum file size reduction (up to 70% additional compression).
5. Separate Vendor Code: Keep third-party libraries separate from your code. Compress them once and cache them for better performance.
Website Performance Optimization: Reduce JavaScript and CSS file sizes to improve page load times, Core Web Vitals scores, and overall user experience.
Mobile App Development: Minimize bundle sizes for React Native, Ionic, and Cordova apps to reduce download times and app store package sizes.
API Response Optimization: Compress JSON responses to reduce bandwidth usage and improve API response times for mobile and IoT applications.
Content Delivery Networks (CDN): Smaller files mean lower CDN costs and faster global content delivery to users worldwide.
Progressive Web Apps (PWA): Meet strict size requirements for PWAs and improve lighthouse scores with aggressive code compression.
Our compressor includes professional features rarely found in free tools: support for ES6+ syntax including arrow functions, async/await, destructuring, and template literals; preservation of important comments marked with /*! */; automatic semicolon insertion optimization; property access optimization; and intelligent boolean optimization.
The tool also handles edge cases like Unicode characters in variable names, preserves legal notices in comments when required, optimizes switch statements and if-else chains, and provides detailed error reporting with line numbers for syntax errors.
Use Short Variable Names: While mangling automates this, starting with shorter names provides better baseline compression.
Avoid Excessive Comments: Document your code well in development, but remember that comments add significant file size.
Write Concise Code: Shorter code compresses better. Use ternary operators, arrow functions, and destructuring for more compact syntax.
Remove Console Logs: Debug statements aren't needed in production and add unnecessary bytes to your bundle.
Optimize Dependencies: Audit your node_modules. Remove unused dependencies and consider lighter alternatives.