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🔒 No upload — runs in your browser

JavaScript Formatter

Paste JavaScript and get clean, consistently indented code. Strings, comments, regexes and template literals stay exactly as written. It runs entirely in your browser — no signup, no installation, and nothing you paste or drop leaves your device.

Input lines0
Output lines0
Tokens0
Indent2

What this JavaScript formatter does

Paste any JavaScript — a single function, a snippet from a code review or an entire file — and this formatter rewrites the whitespace so the structure becomes readable. Nested blocks are indented, statements start on their own lines, and operators, commas and parentheses get consistent spacing. Strings, comments, regular expressions and template literals are copied through byte for byte, so nothing inside them is ever altered. Choose two spaces, four spaces or tabs, then copy the result or download it as a .js file. An unbalanced bracket, an unterminated string or an unclosed comment is reported with its line number instead of being silently reformatted. Everything runs in your browser: the code you paste is never uploaded.

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What is JavaScript Formatter?

JavaScript Formatter is a free online developer tool built for developers debugging payloads, configs and code. Paste JavaScript and get clean, consistently indented code. Strings, comments, regexes and template literals stay exactly as written In practice you paste your JavaScript, choose the indent width, and then copy the formatted code, with strings, comments and regexes left untouched.

Your code, tokens and payloads never leave the browser, which matters when you are debugging something under NDA or handling production data.

How to use JavaScript Formatter

  1. Paste your JavaScript.
  2. Choose the indent width.
  3. Copy the formatted code, with strings, comments and regexes left untouched.

JavaScript Formatter FAQ

Is JavaScript Formatter free to use?

Yes. JavaScript Formatter is completely free and needs no account, no trial and no payment details. Every feature on the page is available without limits.

Is my data uploaded anywhere?

No. JavaScript Formatter runs entirely in your browser, so the text, file or number you enter never leaves your device.

Does JavaScript Formatter work on a phone or tablet?

Yes. It works in any modern browser on desktop, tablet and phone. There is no app to install and no account to create.

How do I use JavaScript Formatter?

Paste your JavaScript. Choose the indent width. Copy the formatted code, with strings, comments and regexes left untouched.

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