JSON Formatter & Validator

Format, validate, and minify JSON instantly with clear error feedback.

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Calculator

Status

Idle

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How it works

Paste JSON into the input box and click Format or Minify. The tool validates the JSON and produces a clean output. Results are for informational purposes only.

FAQ

Are trailing commas allowed in JSON?

No. Standard JSON does not allow trailing commas in arrays or objects, which will cause parse errors.

Do JSON keys need double quotes?

Yes. JSON requires keys and string values to use double quotes, not single quotes.

What does this JSON formatter do?

It validates JSON, formats it with indentation, and can also minify it for compact output.

Is this tool free to use?

Yes. This JSON formatter is free and does not require an account.