JavaScript Minifier & Beautifier
Minify or format JS safely in your browser (Terser/Prettier)
Click or drag and drop a JavaScript file here
Input JavaScript
Output
Frequently Asked Questions
What does the JavaScript Minifier do?
It uses Terser to remove whitespace/comments and apply safe optimizations for smaller, faster JS.
How does Beautify work?
It loads Prettier on demand to format your JS with consistent indentation and spacing.
Is it safe?
Yes — everything runs locally in your browser. Files are never uploaded to a server.
Which files are supported?
You can paste code or upload .js/.mjs/.cjs/.txt files with JavaScript code.
What if my code uses modern syntax?
Terser and Prettier handle modern JS (ESNext) and most common patterns.
Is this free?
Yes. FreeTools24 provides this tool at no cost.