Free JavaScript Formatter
Turn minified or cramped JavaScript into readable, indented code. This free formatter understands braces, strings, comments, and template literals — so it never breaks your code while reflowing it — and gives you control over indentation style.
Formatted JavaScript
How to Use the JavaScript Formatter
- Paste your JavaScript — minified or poorly formatted.
- Choose your indentation: 2 spaces, 4 spaces, or tabs.
- Click Format JavaScript to beautify it instantly.
- Copy or download the readable code.
Features
The formatter tokenizes JavaScript properly: strings (single, double, and template literals), line and block comments, and regex literals are recognized so braces inside them never affect indentation. Statements break after semicolons outside of for-loop headers, blocks indent on braces, and comments stay attached to their code.
Benefits & Use Cases
Developers beautify minified library code pulled from production before debugging; reviewers reformat pasted snippets to match house style; students read real-world scripts comfortably. Because parsing is string-aware, the output is safe to run — formatting never alters semantics.
Tips
This is a lightweight beautifier, not a full compiler — extremely unusual syntax may format imperfectly, so give the output a quick scan. For a final style pass, run the result through your project’s Prettier or ESLint config.
Frequently Asked Questions
What does a JavaScript formatter do?
It rewrites JavaScript with consistent indentation and line breaks — one statement per line, blocks indented — so minified or messy code becomes easy to read, without changing what the code does.
Is the formatted code safe to run?
Yes. The formatter only changes whitespace and line breaks; it never renames variables, reorders statements, or alters logic. Strings and comments are protected during parsing.
Why does my minified code format oddly in one spot?
Minified code sometimes uses exotic but valid syntax (like comma operators or regex literals) that a lightweight formatter may misread. The vast majority of code formats cleanly; unusual constructs deserve a manual check.
Does it sort or change my code style otherwise?
No. It does not rename variables, convert quotes, add semicolons, or enforce naming conventions — it purely handles layout. Use a linter for style rules.
Is my code uploaded anywhere?
No. Formatting runs entirely in your browser — your JavaScript never leaves your device.
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