JavaScript / React Formatter
Format, validate, and beautify JavaScript, and React (JSX) code online.
What is a JavaScript / JSX Code Formatter?
A code formatter (sometimes called a “beautifier”) automatically rewrites your JavaScript or React (JSX) to follow consistent spacing, indentation, and line breaks—without changing what the code does. This makes code easier to read, review, and maintain, especially when working on teams or sharing snippets.
This tool focuses on formatting and quick validation feedback. It helps clean up messy code, normalize indentation, and highlight potential syntax problems so you can catch issues earlier—before running or deploying code.
How do I format code online?+
Paste your code, pick the language, and click format.
Are my files uploaded anywhere?+
No. Formatting happens entirely in your browser. Nothing is sent to a server, so your data stays on your device.
Is it free?+
Yes. No signup, no limits, no watermarks.