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JSON Formatter

Format, validate, and minify JSON instantly. Private — your data is never sent to any server.

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Input

Output

Click Format or Minify to process your JSON

Paste any JSON to pretty-print it with proper indentation, catch syntax errors with a clear message, or minify it down to a single line for production use — all processed locally in your browser.

常见问题解答

Is my JSON data sent to a server?
No. Parsing, formatting, and minifying all happen locally in your browser using standard JSON parsing — nothing is transmitted anywhere.
What happens if my JSON is invalid?
You'll see the specific parsing error message so you can locate and fix the problem in your input.
What is the difference between Format and Minify?
Format adds indentation and line breaks for readability. Minify strips all unnecessary whitespace to produce the smallest possible file size.

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