JavaScript Beautifier
Paste JavaScript to format it with consistent indentation and line breaks. Strings and comments are preserved.
Input
LocalOutput
—About JavaScript Beautifier
The JavaScript Beautifier reformats code with consistent indentation and line breaks while preserving strings and comments. It is for developers making minified or messy scripts readable enough to inspect or debug.
Minified or poorly formatted JavaScript is hard to follow. Beautifying it locally restores structure so you can read it, without pasting potentially sensitive code into an online service.
Step by step
- Paste the JavaScript you want to format.
- The beautifier applies consistent indentation and spacing.
- Strings and comments are left intact.
- Read or edit the formatted result.
- Copy it or download it.
What it offers
- Consistent indentation and line breaks
- Strings and comments preserved
- Handles minified input
- Runs in the browser
Where it helps
- Making a minified bundle readable while debugging
- Tidying a script before code review
- Studying how a third-party snippet works
- Cleaning up hastily written code
Tips for best results
- Beautifying aids reading but does not change behaviour — it is not a substitute for a linter or formatter in your project.
- For a team codebase, adopt a tool like Prettier so formatting stays consistent automatically.
- Beautified third-party code may still be obfuscated in logic even once the layout is clear.
Why people use it
Readable code
Indentation and breaks expose structure.
Safe content
Strings and comments are not altered.
Works on minified input
Expands compact code into legible form.
Private
Your code never leaves the browser.
Common questions
This runs entirely in your browser
No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.