Processing Mode
Choose how you want to process your code
Options
Paste or drop your code here
Minified output will appear here
Powerful Code Minification and Beautification Tool
Transform and optimize code instantly with professional-grade minification and beautification. Support for 12+ programming languages including JavaScript, TypeScript, CSS, HTML, and more. Process code directly in the browser with no server uploads required.
Experience instant code minification and beautification with client-side processing. No waiting for server responses or upload delays.
- • Process files up to several MB instantly
- • Real-time syntax highlighting and validation
- • Immediate visual feedback with diff view
- • Statistics showing size reduction percentage
Comprehensive support for modern web development languages with specialized processing for each format.
- • JavaScript (ES5 to ES2022)
- • TypeScript with type preservation
- • JSX and TSX for React components
- • CSS, SCSS, LESS with variable support
- • HTML, XML, SVG markup optimization
- • JSON and Markdown formatting
All code processing happens locally in the browser. Files never leave the device, ensuring complete privacy and security.
- • 100% client-side processing
- • No code uploaded to servers
- • Works offline after initial load
- • No data collection or tracking
How to Minify and Beautify Code
Choose Processing Mode
Select Minify to compress code and reduce file size, or Beautify to format code with proper indentation and spacing. Minification removes whitespace, comments, and shortens variable names. Beautification adds consistent formatting for improved readability.
Select Language and Upload Code
Choose the programming language from the dropdown menu. Upload a file using the Upload button, drag and drop a file into the editor, or paste code directly. The tool automatically detects file extensions (.js, .ts, .css, .html, etc.) and sets the correct language.
Configure Processing Options
Expand the Advanced Options section to customize processing. Toggle comment removal, whitespace collapsing, variable mangling, and compression. For JavaScript/TypeScript, select the ES target version (ES5, ES2015, ES2017, ES2020, ES2022) to ensure compatibility. Adjust formatting preferences like tab width, quote style, and semicolon usage.
Process and Review Results
Click the Minify or Beautify button to process the code. View results instantly in the output panel with syntax highlighting. Enable Diff View to see a side-by-side comparison highlighting changes. Check the Statistics accordion for detailed metrics including original size, processed size, reduction percentage, and processing time.
Download or Copy Output
Use the Copy button to copy processed code to clipboard for immediate use. Click Download to save the processed file with an automatically generated filename (e.g., minified-app.js). For JavaScript/TypeScript minification, enable Source Map generation to create .map files for debugging minified code in production.
Advanced Features
Process multiple files sequentially by clearing and uploading new code. Download the original source file using the Source button if modifications were made. Use the Clear All button to reset both input and output panels. Switch between light, dark, and system themes for comfortable viewing in any environment.
Comprehensive Code Processing Features
Professional-grade minification engine powered by Terser and CleanCSS. Achieves optimal file size reduction while maintaining code functionality.
- • Variable Mangling: Shortens variable and function names to single characters
- • Dead Code Elimination: Removes unreachable code and unused variables
- • Constant Folding: Evaluates constant expressions at compile time
- • Property Optimization: Shortens property access where safe
- • Whitespace Removal: Eliminates all unnecessary spaces and newlines
- • Comment Stripping: Removes comments while preserving special directives
Transform messy or minified code into clean, readable format with consistent indentation and spacing. Perfect for code review and maintenance.
- • Configurable Indentation: Choose between tabs or spaces with custom width
- • Quote Normalization: Standardize single or double quotes throughout code
- • Semicolon Management: Add or remove semicolons based on preference
- • Brace Style: Format braces according to coding standards
- • Line Breaks: Add appropriate line breaks for improved readability
- • Comment Preservation: Maintain comments with proper formatting
Compile modern JavaScript and TypeScript to older ECMAScript versions for broad browser support. Automatically transpiles new syntax to compatible equivalents.
- • ES5: Internet Explorer 9+ compatibility (includes polyfills for modern features)
- • ES2015 (ES6): Arrow functions, classes, let/const, template literals
- • ES2017: Async/await, Object.entries, String padding (recommended default)
- • ES2020: Optional chaining, nullish coalescing, BigInt support
- • ES2022: Class fields, top-level await, private methods and properties
Generate source maps for JavaScript and TypeScript files to enable debugging of minified code. Browser developer tools can map minified code back to original source.
- • Line Mapping: Track every line in minified code to original location
- • Variable Names: Restore original variable and function names during debugging
- • Stack Traces: View meaningful error stack traces with original file references
- • Breakpoint Support: Set breakpoints on original code while running minified version
- • Separate Download: Source maps download independently for deployment flexibility
Language-Specific Processing
- • Full ES5 through ES2022 syntax support
- • TypeScript type annotation preservation option
- • JSX/TSX React component processing
- • Automatic module format detection
- • Tree shaking for unused exports
- • Advanced compression algorithms
- • Source map generation for debugging
- • CSS minification with property optimization
- • SCSS variable resolution and processing
- • LESS variable and mixin support
- • Basic nesting support for preprocessors
- • Color code optimization (hex shorthand)
- • Remove duplicate properties and rules
- • Merge identical selectors automatically
- • HTML5 compliant minification
- • Embedded CSS and JavaScript processing
- • XML case-sensitive tag preservation
- • SVG attribute optimization
- • Remove unnecessary quotes and whitespace
- • Collapse boolean attributes
- • Preserve structural integrity
Common Use Cases
Why Use This Code Minifier
Performance Optimization
Minified code loads faster, reduces bandwidth usage, and improves website performance scores. Achieve better Google PageSpeed Insights and Core Web Vitals metrics. Typical size reductions range from 40% to 80% depending on the original code structure.
Privacy Focused
Unlike online tools that upload code to servers, all processing happens locally in the browser. Proprietary code remains completely private with no risk of exposure. Perfect for processing sensitive business logic, internal tools, or unreleased code.
Developer Friendly
Intuitive interface designed for developers with features like drag-and-drop file upload, syntax highlighting, diff view, and one-click download. No account required, no file size limits, and completely free to use for unlimited processing.
Frequently Asked Questions
Code minification is the process of removing unnecessary characters from source code without changing functionality. This includes eliminating whitespace, line breaks, comments, and shortening variable names. Minification reduces file size, improves load times, and decreases bandwidth consumption. Modern web applications routinely minify JavaScript, CSS, and HTML before deployment to production.
Code beautification (also called pretty-printing or formatting) transforms code into a more readable format with consistent indentation, spacing, and line breaks. It's the opposite of minification. Beautification is useful for code review, debugging minified code, standardizing code style across teams, and improving maintainability of legacy code.
Yes, completely secure. All code processing occurs locally in the browser using JavaScript libraries. No code is ever uploaded to external servers or transmitted over the network. The tool works entirely offline after the initial page load. This ensures complete privacy for proprietary or sensitive code.
File size limits depend on browser memory capabilities, not artificial restrictions. Most browsers can handle files up to several megabytes without issues. Very large files (10MB+) may experience slower processing times. For optimal performance, consider processing extremely large files in smaller chunks or using command-line tools.
No installation required. This is a web-based tool that runs entirely in the browser. Simply visit the page in any modern browser (Chrome, Firefox, Safari, Edge) and start processing code immediately. For frequent use, bookmark the page or install it as a Progressive Web App (PWA) for offline access.
Currently, the tool processes one file at a time. For batch processing, process each file individually using the Clear All button between files. The interface is optimized for quick successive processing. For automated batch processing of many files, consider using command-line tools like Terser or UglifyJS integrated into build pipelines.
Technical Specifications
Processing Engines
Browser Compatibility
Supports all modern browsers: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+. Requires JavaScript enabled. Progressive Web App capabilities allow offline usage after initial load. Mobile browsers supported with optimized touch interface.
Performance Characteristics
Typical processing times: small files (<100KB) in <100ms, medium files (100KB-1MB) in 100-500ms, large files (1MB-5MB) in 500ms-2s. Performance varies by device CPU, code complexity, and selected options. Heavy compression and mangling increase processing time but maximize size reduction.