JSON tool

JSON Validator

Validate JSON syntax and find parse errors before using it in code or APIs.

Use the tool

Common use cases

  • Format API responses for debugging.
  • Clean JSON before sharing it in docs.
  • Prepare examples for prompts, tests and frontend code.

Example input

{"ok":true,"items":[1,2,3]}

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FAQ

What makes JSON invalid?

Common issues include trailing commas, comments, single quotes, missing quotes around keys and unmatched brackets.

Can this validate JSON arrays?

Yes. Any valid JSON value can be validated, including objects, arrays, strings, numbers, booleans and null.

Is validation local?

Yes. Validation runs in your browser.