Is my data sent to a server?

No. Everything runs locally in your browser and nothing is uploaded, so the tool is safe even for sensitive data.

Can I choose the indentation?

Yes. Pick 2 or 4 spaces in the options and the tool reindents the whole document consistently.

100% local — your data never leaves your browser

JavaScript Formatter — Free Online Developer Tool

Format and beautify JavaScript with consistent indentation — turn minified or messy code into readable code. Free, private and 100% in your browser.

Instant Private Zero cookies

Indentation

JavaScript input

JavaScript output

What this tool does

Format and beautify JavaScript with consistent indentation — turn minified or messy code into readable code.

Private by design

Everything runs locally in your browser with JavaScript. Your data is never uploaded, which makes the tool safe for sensitive content, and it keeps working offline.

Frequently asked questions

Is my data sent to a server?: No. Everything runs locally in your browser and nothing is uploaded, so the tool is safe even for sensitive data.
Can I choose the indentation?: Yes. Pick 2 or 4 spaces in the options and the tool reindents the whole document consistently.

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