JavaScript Beautifier
Beautify, minify, and validate JavaScript or JSX instantly. Clean messy code, improve readability, catch syntax issues, and export the formatted result for frontend, backend, and developer workflows.
Beautifier Controls
Controls are placed above the editors so you get more width and height for large code blocks.
Output mode
Status
Paste JavaScript or JSX and click format or validate.
Current mode
beautify
Indentation
2 spaces
Line width
80
Error location
-
Included features
- Controls moved to the top for larger input and output editors.
- Line numbers in both panes for easier navigation.
- Error line highlighting in the input gutter.
- One-click jump to the detected error line.
- Beautify, minify, validate, upload, copy, and download support.
JavaScript error details
Paste JavaScript or JSX and click format or validate.
An exact line and column could not be detected from the parser message.
Total input lines: 15
What can this JavaScript beautifier do?
This tool formats JavaScript and JSX for readability, minifies code for compact output, validates syntax, and lets you control common style options like tab width, semicolons, quotes, trailing commas, and line width.
Common use cases
Use it for API scripts, frontend components, utility functions, Node.js code, code cleanup before commits, quick debugging, and preparing readable snippets for documentation or teammates.