📜 JS Formatter
Format and beautify JavaScript code free online. Fix indentation, spacing and structure instantly. Browser-based, no upload.
📜 JS Formatter
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About the JS Formatter Tool
Consistent formatting is not cosmetic — it is how you read code quickly. Inconsistent indentation hides scope, and a minified bundle hides everything. When you inherit a file with mixed tabs and spaces, or need to understand a production script, formatting comes first.
This beautifier restores proper indentation, spacing around operators, and line breaks so structure becomes visible. It handles modern syntax including arrow functions, template literals, async and await, and destructuring. Processing runs in your browser, so proprietary code is never uploaded.
How to Use JS Formatter
- Paste your JavaScript into the input area.
- Press Format to apply consistent structure.
- Review the indentation and spacing.
- Copy the formatted code back into your editor.
When to Use This Tool
- Making a minified production bundle readable for debugging
- Normalising formatting in a file with mixed indentation styles
- Cleaning up code pasted from a forum, tutorial, or documentation
- Preparing a snippet for a code review or blog post
- Understanding an unfamiliar script’s structure
Things Worth Knowing
- Formatting changes whitespace only — logic and behaviour are identical.
- Modern ES6 and later syntax is supported.
- Deliberately obfuscated code can be reformatted but will not become readable, since names have already been mangled.
Quick Facts
| Tool name | JS Formatter |
| Category | Developer Tools |
| Price | Free — no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None — your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
Will formatting break my code?
No. JavaScript whitespace is not significant except inside strings and template literals, which are preserved verbatim. Behaviour is unchanged.
Can it deobfuscate minified code?
It restores structure and indentation, which helps considerably. It cannot restore original variable and function names, because minification discarded them permanently.
Does it support JSX and TypeScript?
Basic JSX is generally handled. TypeScript type annotations may format imperfectly — use a TypeScript-aware formatter for those files.
Is my code uploaded to a server?
No. Everything runs in your browser, so proprietary source stays on your machine.