Tools / Development

Code Formatter

Paste JavaScript, CSS, HTML, Markdown, or YAML code and get it neatly formatted.

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Code Formatter

Code input

Result

Enter code on the left and click Format.

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Need to format or minify JSON? Try the JSON Formatter.

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Tool info

Category Development

Processing Directly in your browser

Data storage Not stored

Updated 2026-08-24

How to use

Paste the code you want to format into the input box on the left.

Pick the matching language: JavaScript/TS, CSS, HTML, Markdown, or YAML.

Click Format to get code with clean indentation and line breaks.

Use the copy button on the result box to grab the formatted code.

FAQ

자주 묻는 질문

Q1. Is my code sent to a server?

No. Formatting runs entirely in your browser using the Prettier engine and is never sent to or stored on a server.

Q2. Which languages are supported?

You can format JavaScript/TypeScript, CSS, HTML, Markdown, and YAML. For JSON, use the dedicated JSON Formatter tool instead.

Q3. What happens if my code has a syntax error?

If the code isn't valid, the tool shows an error message above the result explaining why it couldn't be formatted.

Q4. What formatting engine does this use?

It runs Prettier, a widely used open-source code formatter, directly in your browser and follows its default style rules like 2-space indentation and semicolons.

Q5. Is there a limit on how much code I can format?

There's no fixed size limit — it works as long as your browser has enough memory. Very large files may just take a few extra seconds.

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