JavaScript Formatter — Beautify JS Online Free
Paste minified, obfuscated, or inconsistently formatted JavaScript and get back clean, readable code in seconds. This free JavaScript formatter online uses js-beautify with options for indent size, quote style, and automatic console.log removal — no Node.js, no installation, nothing to configure. For back-end work you may also need to format SQL queries or parse XML responses from external APIs.
How to Use the JavaScript Formatter
- Paste raw, minified, or obfuscated JavaScript into the left input panel.
- Choose your indent size (2 spaces, 4 spaces, or tabs) and quote style (single, double, or auto-detect).
- Optionally enable Remove console.log to strip all console statements from the output.
- Click Beautify JS or enable Format on Paste for automatic formatting on paste.
- Switch to Minify to compact the code by stripping comments and collapsing whitespace.
- Copy the result to your clipboard or download it as a
.jsfile.
Key Features
- Powered by the industry-standard js-beautify library for reliable JavaScript formatting.
- Choice of 2-space, 4-space, or tab indentation to match your project's style guide.
- Quote style normalization: convert to single quotes (Airbnb/Prettier default) or double quotes (Google style guide).
- Remove console.log toggle: strips
console.log,console.warn,console.error,console.info, andconsole.debug. - Minify mode: strips
//and/* */comments, collapses whitespace and operator spacing. - Format-on-paste: formats automatically as soon as you paste code.
- Live stats: line count and character count.
- Download the formatted output as a
.jsfile.
Use Cases
Beautify minified JavaScript from a production bundle
When a JavaScript bug surfaces in production, you often need to read a minified bundle to trace it. Pasting the bundle into this JS formatter instantly produces readable, indented code you can search and reason about — far faster than trying to parse single-line output.
Format JavaScript code before a code review
Inconsistently indented JavaScript is hard to review in pull requests. Running your file through the formatter before opening a PR ensures each function, block, and condition is properly indented and easy to read for reviewers.
Remove console.log statements before committing
Debug console.log calls left in production code pollute browser consoles and expose internal data. The Remove console.log toggle strips all common console methods from the output, giving you a clean version ready to commit or deploy.
Normalize JavaScript quote style across a codebase
Mixed single and double quotes in the same codebase is a frequent source of merge conflicts and linting warnings. The quote style normalizer converts all string literals to your chosen convention in one pass — a quick step before integrating third-party code.
Inspect and format obfuscated vendor JavaScript
Third-party scripts, analytics libraries, and ad tags are often heavily obfuscated. While this formatter cannot reverse obfuscation, it can at least re-indent and space the code to make its structure navigable for security review or debugging.
FAQ's
Yes. The js-beautify library handles ES6+ syntax including arrow functions, template literals, destructuring, spread/rest operators, async/await, and import/export statements. It is regularly updated to support the latest JavaScript syntax.
The console.log removal uses a regex that matches common console method calls. It safely removes simple console.log('message') patterns. However, multi-line console calls or console output used inside conditional expressions should be reviewed manually after removal.
No. This tool uses js-beautify, which is a different formatter from Prettier. Prettier enforces its own opinionated style and requires Node.js. ESLint is a linter, not a formatter. For a quick browser-based format without any install, js-beautify is ideal. For CI pipelines, integrate Prettier or ESLint.
Basic TypeScript can be formatted — type annotations and simple interfaces work fine — but js-beautify is not TypeScript-aware. Complex TypeScript constructs like decorators or generics with complex constraints may not format correctly. For TypeScript, use the Prettier TypeScript plugin in your editor.
The Minify button strips single-line // comments, block /* */ comments, and collapses all whitespace. It also removes spaces around operators and brackets. Note this is a basic minifier — for advanced dead-code elimination and tree-shaking, use dedicated tools like Terser in your build pipeline.
No. All formatting happens entirely in your browser using the js-beautify library client-side. Your code never leaves your device and is never transmitted to any external server.
Just open this page in any modern browser — no Node.js, no npm, no installation of any kind. The js-beautify library loads directly in the browser. Paste your code, click Beautify JS, and copy the formatted result.
Readable JavaScript is a prerequisite for maintainable code, effective code review, and fast debugging. This free JavaScript formatter online handles the mechanical aspects of code style — indentation, brace placement, quote normalization — so you can focus on logic and correctness. The console.log removal feature is particularly useful during the transition from development to production, ensuring debug output does not sneak into live environments. Unlike Prettier or ESLint, which require a local Node.js setup and configuration files, this tool works instantly in any browser tab. Paste your code, pick your style preferences, and get formatted output in under a second — with nothing installed and no data leaving your device.