JavaScript Minifier & Compression Tools
Js Analyzer
Analyze JavaScript code for size, functions, variables, and complexity. Find optimization opportunities. Browser-based, private analysis.
Js Comment Stripper
Remove all comments from JavaScript while preserving code. Clean up scripts for production. Browser-based, instant processing.
Javascript Minifier
Minify JavaScript to reduce file size. Remove whitespace, comments, shorten names. Optimize for production. Free, private, works offline.
JavaScript Code Minification
JavaScript files grow large during development with comments, formatting, and descriptive variable names. Minification compresses code by removing unnecessary characters and shortening identifiers.
Minification Techniques
- Whitespace removal: Eliminates spaces, tabs, and line breaks
- Comment stripping: Removes all comments except license notices
- Identifier shortening: Renames variables to single-letter names
- Dead code elimination: Removes unreachable code
Production Benefits
Minified JavaScript typically achieves 30-60% size reduction. Smaller files mean faster downloads, reduced bandwidth costs, and improved page load performance. Combined with gzip compression, minification provides significant savings.
Source Maps
While this browser tool doesn't generate source maps, production build tools can create mapping files that link minified code back to original sources for easier debugging.