CODE FORMATTERS
Free JavaScript Beautifier online
Format and indent JavaScript code.
JavaScript Beautifier on DocTools helps you format and indent JavaScript code, with no account needed. Enter your file, review the live JavaScript Beautifier output, then copy or download it. JavaScript Beautifier runs locally on your device, so nothing is uploaded to a server.
- Free to use
- No signup
- Private and local
- Unlimited use
Why use JavaScript Beautifier
- format and indent JavaScript code without installing software
- Your file is processed on your device by JavaScript Beautifier, never uploaded
- JavaScript Beautifier needs no account, email address or payment details
- JavaScript Beautifier shows live output that updates as you type
- JavaScript Beautifier is keyboard accessible and screen-reader friendly
- JavaScript Beautifier is free forever, with no watermark on the result
JavaScript Beautifier runs entirely inside your browser. Your file is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use JavaScript Beautifier
- Enter your file Paste or type your file into the input panel above.
- Adjust the options Set the options that control how JavaScript Beautifier handles your input.
- Process it JavaScript Beautifier works instantly on your device, with no queue and no upload wait.
- Copy or download Copy the output to your clipboard or download it as a file, free and unlimited.
Benefits
Private by design
Your file stays on your device while JavaScript Beautifier works. JavaScript Beautifier never sends it to a server, so confidential work stays confidential.
Instant results
There is no upload step, so JavaScript Beautifier starts the moment you add your file.
No signup, no limits
Use JavaScript Beautifier as many times as you want. JavaScript Beautifier asks for no account, adds no watermark and keeps no paid tier gating the output.
Works on any device
JavaScript Beautifier runs in any modern browser on desktop, tablet and phone, with a keyboard-accessible interface throughout.
Who it is for
For developers
Developers use JavaScript Beautifier to debug and ship faster without installing software: format and indent JavaScript code on a shared or locked-down machine.
For freelancers
JavaScript Beautifier helps freelancers send client deliverables quickly, since your file never leaves the laptop it was created on.
For support teams
JavaScript Beautifier helps support teams answer customer requests quickly, since your file never leaves the laptop it was created on.
How it works
JavaScript Beautifier loads your file into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of JavaScript Beautifier happens inside your browser sandbox.
Frequently asked questions
Is JavaScript Beautifier free to use?
Yes. JavaScript Beautifier is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does JavaScript Beautifier upload your file to a server?
No. JavaScript Beautifier processes your file inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a limit on how much input I can use?
JavaScript Beautifier handles inputs into the megabytes without trouble; the only real limit is how much your browser tab can hold in memory.
Do I need to install anything to use JavaScript Beautifier?
No installation is needed. JavaScript Beautifier runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use JavaScript Beautifier on a phone or tablet?
Yes. The JavaScript Beautifier interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your file when I close the tab?
It is discarded. JavaScript Beautifier keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
Related tools
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Last updated: 2026-09-07