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JSON Formatter and Validator

Paste JSON to validate it, format it for reading, minify it for compact use and copy the output.

This tool runs in your browser. Pasted JSON is not sent to ToolStaxx by this calculator.

Notes and next steps

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How it works

Validate JSON, format it for reading, minify it for compact use and copy the result.

Validation rules: Valid JSON must use quoted keys/strings, commas between items and matching braces/brackets.

Worked example

Paste {"name":"ToolStaxx","live":true} and format it into readable indented JSON.

Common mistakes
  • Trailing commas.
  • Single quotes instead of double quotes.
  • Comments in JSON files that do not support comments.
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FAQ

Does formatting change the JSON data?

Formatting changes spacing and indentation only. Minifying removes unnecessary whitespace.

Can I paste secrets into the formatter?

Do not paste passwords, tokens, private keys or other confidential values into web tools.