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Code & Data Tool
JavaScript Formatter
Format JavaScript safely without executing code.
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About this tool
What is JavaScript Formatter?
JavaScript Formatter makes JavaScript readable with consistent indentation, and it does so without ever running your code. It is useful for reading minified scripts or tidying code before you share it.
Useful when you need to
- Read a minified script
- Clean up code for a lab submission
- Make pasted snippets consistent
How to use
How to use JavaScript Formatter
01 02 Format
Run Format to re-indent it.
03 Read the output
Check that the structure looks right.
04 Copy
Copy the formatted code.
Tips
Get better results
- The code is only formatted, never executed, so it is safe to paste unfamiliar snippets.
- Formatting does not fix syntax errors.
FAQ
Frequently asked questions
Does it run my code?
No. It only reformats the text.
Does it support modern syntax?
Common modern syntax is handled, but very new features may format imperfectly.
Is the code uploaded?
No, it stays in your browser.
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