JavaScript beautifier
WEBFree online JavaScript beautifier and minifier that formats, indents, and compacts JS code in your browser.
What is the JavaScript beautifier tool?
This JavaScript beautifier reformats messy or minified JS into clean, consistently indented code you can actually read and debug — free, with no sign-up, and processed entirely in your browser. Paste a function, a module or a whole file, click Beautify, and an industry-standard formatting engine restores indentation, spacing and line breaks. Live syntax highlighting helps you follow the logic while you edit, and you can copy the output or download it as a .js file in one click.
Its most common job is to unminify JavaScript: paste a compressed production bundle or a one-line script from a page you are debugging, and beautify it back into structured source. That raises a real privacy question — pasting proprietary code into a random website usually means sending it to someone's server. Here it never leaves your machine: formatting runs client-side, nothing is transmitted or logged, and the page keeps working offline once loaded, so production code stays yours.
The same tool minifies too, and deliberately safely: Minify strips comments and insignificant whitespace but never renames identifiers, and the contents of strings and template literals are left untouched — so the minified script behaves exactly like the original and can always be beautified again. Use it to tidy generated code, review a snippet from a pull request, or shrink a small script before shipping, on desktop or on your phone.
How to use the JavaScript beautifier
- Paste or type your JavaScript into the editor.
- Click Beautify to restore clean indentation, spacing and line breaks.
- Or click Minify to strip comments and whitespace without renaming anything.
- Read the result with live syntax highlighting to follow the logic.
- Copy the code or download it as a .js file.
Frequently asked questions
How do I unminify JavaScript?
Paste the minified script into the editor and click Beautify. The one-line bundle expands back into indented, structured code with readable line breaks — done locally in your browser, so the code is never sent anywhere.
Can it deobfuscate JavaScript?
It restores formatting — indentation, spacing and line breaks — which is often enough to make minified code readable. It cannot restore original variable names that a minifier shortened or reverse deliberate obfuscation; no formatter can, because that information is gone from the file.
Is it safe to paste production or proprietary code here?
Yes. All beautifying and minifying happens on your device in the browser — nothing is uploaded, transmitted or logged, and the tool works offline once loaded. That is the difference from formatter sites that process code server-side.
What's the difference between beautifying and minifying?
Beautify adds indentation and line breaks so the code is readable for humans; minify removes comments and insignificant whitespace so the file is smaller for shipping. This tool does both, and you can round-trip between them freely.
Does the minifier rename my variables?
No. It only removes comments and whitespace — identifiers keep their names and strings and template literals are preserved verbatim, so behavior is unchanged. For aggressive size reduction with identifier mangling, use a build-tool minifier like Terser; for a quick, safe shrink, this is the simpler path.
Is the JavaScript beautifier free?
Yes, entirely — no sign-up, no watermark and no limit on how much code you beautify, unminify or minify.
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