JavaScript Formatter & Beautifier
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Minified or auto-generated JavaScript, whether from a bundler, a code snippet you found online, or minified production code, is extremely difficult to read as one long line. This JavaScript formatter parses your code and reformats it with consistent indentation, line breaks, and spacing around operators and braces, turning it back into readable, well-structured code. It works for both JavaScript and TypeScript syntax, making it useful for developers debugging a minified bundle, reviewing a code snippet before pasting it into their editor, or students learning to read properly formatted JS. The formatter respects standard bracket and semicolon conventions so the output looks hand-written. Since formatting happens entirely in your browser, your code is never uploaded to a server, and there's no signup required. Paste your JavaScript below to see it beautifully formatted instantly.
Features
- Beautifies JavaScript and TypeScript with consistent indentation
- Adds proper spacing around operators, braces, and commas
- Handles ES6+ syntax including arrow functions and destructuring
- Formats objects, arrays, and function calls readably
- Preserves comments in their original position
- One-click minify toggle for the same code
- Copy-to-clipboard and download-as-file options
- Fully client-side with no data upload
Why use this javascript formatter & beautifier?
- Formats even minified or bundled code in milliseconds
- Keeps your source code private with local-only processing
- Produces readable, conventionally-styled output
- Simple paste-and-go interface with no setup
- Completely free with unlimited use
Frequently asked questions
What does a JavaScript formatter do?
It rewrites minified or inconsistently spaced JavaScript code with proper indentation, line breaks, and spacing so it's readable and easier to debug.
Does it support TypeScript syntax?
Yes, the formatter handles TypeScript-specific syntax like type annotations, interfaces, and generics in addition to standard JavaScript.
Will formatting change how my code runs?
No, only whitespace, indentation, and line breaks are changed - the code's logic and execution behavior remain exactly the same.
Can it handle modern ES6+ syntax like arrow functions?
Yes, arrow functions, destructuring, template literals, and other modern JavaScript syntax are formatted correctly.
Is my code uploaded to a server to format it?
No, formatting happens entirely in your browser using client-side JavaScript, so your source code is never sent anywhere.
Can this tool also minify JavaScript?
Yes, you can toggle to a minified view of the same code for production use.
Does it preserve comments in the code?
Yes, both single-line and block comments are preserved in their original position relative to the surrounding code.