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JS Minifier / Beautifier
Minify JavaScript with Terser or format it with Prettier.
How to Use JS Minifier / Beautifier
- 1Choose 'Minify' (with Terser) or 'Beautify' (with Prettier).
- 2Paste your JavaScript code.
- 3Click the button — output appears instantly.
- 4Copy the result.
Frequently Asked Questions
Does Terser support modern JavaScript?
Yes — Terser supports ES2020+ syntax including optional chaining, nullish coalescing, and modules.
Will minification break my code?
Terser only performs safe transformations. It renames local variables and removes unreachable code, but never changes observable behaviour.
About JS Minifier / Beautifier
JavaScript minification is a critical step in web performance — it reduces file size by shortening variable names, removing whitespace, and eliminating dead code. Our tool uses Terser for minification and Prettier for formatting, the same tools used by Webpack, Vite, and Next.js.