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JSON Validator

Instantly validate your JSON and get a clear, specific error message if something's wrong.

How to Use JSON Validator

  1. Paste your JSON into the box.
  2. Click Validate JSON.
  3. See instantly whether it's valid, with the exact error location if not.

Features

🎯

Precise error location

⚡

Instant validation

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Nothing uploaded

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Mobile friendly

Frequently Asked Questions

Is it free?

Yes.

What's a common JSON error?

Trailing commas, missing quotes around keys, or mismatched brackets are the most common issues.

Does this fix invalid JSON automatically?

No, it only validates and reports errors — use the JSON Formatter to auto-correct formatting once valid.

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What makes JSON invalid?
Common causes include trailing commas, single quotes instead of double quotes, or unescaped special characters.
Why do I need to validate JSON?
Invalid JSON will break APIs, config files, or applications that try to parse it — catching errors early saves debugging time.
Can JSON have comments?
No, standard JSON does not support comments — remove them before validating.

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