🧰ToolMarketKR
🧩

Free JSON Formatter - Use Online Without Installing

Web

Format, beautify, and validate JSON

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How to use this tool

  1. Paste JSON into the input.
  2. Choose Pretty to inspect indentation or Minify to remove whitespace.
  3. Fix syntax errors before copying the result.

Real-world uses

  • Inspect a nested API response.
  • Check a configuration file before publishing it.

What to check

  • Formatting does not validate your application schema.
  • Remove secrets before sharing formatted output.

Common problems and fixes

The JSON is invalid
Check double quotes around keys and strings, plus trailing commas after the last item.

File and input privacy

JSON is parsed and formatted in your browser; input text is not stored on ToolMarket servers.

Questions about this tool

Does this sort object keys?

Treat it as a formatting and syntax tool, not a key-sorting tool.

Practical guides