JavaScript formatter and beautifier.
Paste minified or messy JavaScript and get clean, indented code instantly. Powered by the open source js-beautify, running in your browser, no signup.
Building a whole page? Drop your HTML, CSS and JS onto yapp.page and get a live link in about two seconds. Free, no signup.
Publish a page →01 Readable JavaScript in one paste
- Un-minify: one-line production JS expands into properly indented code.
- Your style: 2 spaces, 4 spaces, or tabs.
- Open source: powered by js-beautify, the standard beautifier library.
- Private: runs entirely in your browser, your code never leaves your machine.
02 Frequently asked questions
How do I format JavaScript online?
Paste your JavaScript above and it is re-indented into clean, readable code instantly, no signup. Pick your indent style and copy the result.
Does it work on minified JavaScript?
Yes, one-line minified JS expands into readable code. Shortened variable names from minification cannot be restored, but structure and readability come back.
Is my code uploaded anywhere?
No. Formatting runs entirely in your browser using the open source js-beautify library.
Is this formatter free?
Yes, completely free, no account, no limits.
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