JavaScript Beautifier
Reformat minified JavaScript with two-space indentation.
- Reading time:
- 2 min
- Last updated:
- Price:
- Free, no signup
Type or paste text to see the result.
What the JavaScript Beautifier does
Drop in minified or jumbled JavaScript and proper indentation appears, one statement per line, with braces where you can see them. A 5,000-character single line becomes code you can actually follow.
Indent size and brace style are adjustable, so the output can match your editor's settings.
Why the JavaScript Beautifier is useful
Debugging minified code is guesswork — every error points at line 1, character 4,832. Beautifying restores the structure so stack traces, breakpoints and plain reading all work again.
It's also how you learn from other people's code: beautify a library snippet and the logic finally shows itself.
Also known as: javascript beautifier, js formatter, free javascript beautifier, online javascript beautifier, javascript beautifier online free, javascript beautifier tool, best javascript beautifier tool.
How to use the JavaScript Beautifier
- 1
Paste the JavaScript
Minified, compressed or merely untidy.
- 2
Choose formatting options
Set indent width and brace placement.
- 3
Copy the readable code
Structured, indented JavaScript, ready to study or edit.
Key features
- Puts every statement back on its own line
- Configurable indent size and brace style
- Handles large minified files
- Private — code never leaves your browser
Benefits
- Make minified code debuggable
- Read third-party scripts and snippets
- Standardize formatting across files
Real-life use cases
Debugging a production error
A developer beautifies the minified bundle section named in a stack trace to find the failing function.
Studying a library
A student expands a compact open-source plugin to see how it wires up event handling.
Recovering lost source
A maintainer beautifies the only surviving copy of an old script — the minified version — to resume development.
Tips for the best results
- Beautified code is readable but variable names stay minified ('a', 't', 'e') — renaming is a separate, manual job.
- Choose an indentation width that suits your codebase before copying results out.
- If the code was obfuscated, not just minified, beautifying helps less — the logic was deliberately scrambled.
Conclusion
Feed in the wall of code and start reading it as it was written.
Frequently asked questions
Will it restore the original variable names?
- No — minifiers rename variables permanently. Beautifying restores structure and formatting, not names.
Does it work on obfuscated code?
- It formats it, but obfuscated logic stays hard to follow by design.
What formatting options exist?
- Indent width, spaces vs. tabs, and brace placement style.
Can it handle large bundle files?
- Yes, within your browser's memory — files of several hundred KB format fine.
Will it fix syntax errors?
- No, it formats valid code. A broken script needs a debugger, not a formatter.
Does anything leave this page?
- No — the work happens locally in your tab.
Related tools you may need
- SQL Formatter — Beautify SQL queries with keyword capitalization.
- CSS Beautifier — Reformat compressed CSS with clean two-space indentation.
- XML Formatter — Beautify XML with clean two-space indentation.
- HTML Formatter — Pretty-print HTML with clean indentation.
- JSON Formatter — Validate and pretty-print JSON with 2-space indentation.
- HTML Beautifier — Pretty-print minified HTML with 2-space indentation.
- CSV to JSON Converter — Turn CSV rows into a JSON array of objects.
- JavaScript Minifier — Basic JavaScript minifier — strips comments and extra whitespace.
Keep exploring
Browse the full tools directory, filter by category, or read guides on the Text Tools Hub blog.