Formatting only changes whitespace and line breaks, so your code keeps working exactly the same.
Processing and privacy
Processing varies by tool. Check the instructions for local processing, server requests, external services and any file or request limits before entering sensitive information.
Read the privacy policyShare this tool
Found it useful? Send it to a friend or teammate.
Rate this tool
5.0
1 rating
- 5 stars 1
- 4 stars 0
- 3 stars 0
- 2 stars 0
- 1 star 0
Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the JavaScript Formatter
Add readable indentation and line breaks to JavaScript source.
- 1 Paste a JavaScript snippet.
- 2 Choose two spaces, four spaces or tabs.
- 3 Review the output and test it in your normal development environment.
Example and practical tips
Format a compact function before checking its branches and return values.
Frequently asked questions
Does it type-check or lint the code?
No. Formatting does not prove correct syntax, types or runtime behavior.
Can I assume all modern syntax is handled perfectly?
No. Keep the original and review unusual syntax, template strings and comments before using the output.
Practical guides
-
How to Use JavaScript Formatter
Beautify JavaScript online by adding readable indentation and line breaks to minified or messy code. Free JavaScript formatter, copy the result.
Report an issue
Something broken or not quite right? Tell us and we will look into it.