JSON Schema Validator
12 toolsValidate JSON data against a schema.
Runs in your browser — your files and text stay on your device
Check JSON data against a JSON Schema and see which paths fail and why. It supports the common keywords type, enum, properties, required and items; advanced keywords such as pattern, minimum/maximum and $ref are not checked. Everything runs in your browser, so your data isn't uploaded.
Format & ValidateTree ViewJSON DiffJSON → CSVJSON ↔ YAMLJSON ↔ XML→ TypeScriptSchema GeneratorSchema ValidatorJSONPath TesterSort KeysJSON Lines
agemissing required property
How to use this tool
- 1Paste a JSON Schema and the JSON data to check.
- 2Validation errors (if any) are listed with their path.
Frequently asked questions
Which JSON Schema keywords are supported?
type, enum, properties, required, and items — enough for common object/array validation. Advanced keywords like pattern, minimum/maximum, or $ref are not currently supported.
Is my data uploaded anywhere?
No, validation runs entirely in your browser.