Tools / Development

JSON Formatter

Enter JSON text to validate it, then format it for readability or minify it to a single line.

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JSON Formatter

JSON input

Result

Enter JSON on the left to see the result here.

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Tool info

Category Development

Processing Directly in your browser

Data storage Not stored

Updated 2026-08-21

How to use

Paste your JSON text into the input box on the left.

Choose Format (2 or 4-space indent) or Minify.

Any syntax errors are shown right below the input.

Use the copy button on the result box to grab the converted JSON.

FAQ

자주 묻는 질문

Q1. Is my JSON input sent to a server?

No. All parsing and conversion happen entirely in your browser and are never sent to or stored on a server.

Q2. How do I know if my JSON has a syntax error?

An "Invalid JSON" message appears below the input box, along with the specific error location and message your browser's parser detected.

Q3. What's the difference between Format and Minify?

Format adds indentation and line breaks for readability, while Minify strips all unnecessary whitespace to reduce size or prepare a compact API request body.

Q4. Can this tool handle JSON with comments?

Standard JSON doesn't allow comments. JSONC or JSON5 with comments will be treated as invalid by this tool.

Q5. Can I change the indentation width?

Yes. In Format mode you can choose between 2-space and 4-space indentation.

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