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JSON Schema Validator
Validate JSON data against a JSON Schema with detailed path-level error messages.
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About this tool
Paste your JSON data on the left and your JSON Schema on the right, then click Validate to check conformance. The built-in pure-JS validator supports type, required, properties, string length, number range, array size, and enum constraints. Errors are reported with full JSON paths (e.g. $.user.age) so you can pinpoint problems instantly.
How to use
- 1 Step 1: Paste or edit your JSON data in the left panel (a sample is pre-filled to get you started).
- 2 Step 2: Paste or edit your JSON Schema in the right panel, defining the expected structure and constraints.
- 3 Step 3: Click the Validate button to run the validation.
- 4 Step 4: Review the results — green means valid, red shows each error with its JSON path and a clear message.