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JSON Schema Validator
Validate JSON data against a schema. Catch errors instantly with fast, browser-based JSON schema validation.
How to use this tool
- Paste JSON Schema and JSON data, then optionally pretty-print each editor.
- Run validation to compile the schema and check data compatibility.
- Review error paths/messages or copy/download schema and data payloads.
Common workflows
- Validate API payload examples before integration handoff.
- Check configuration files against strict schema contracts.
- Debug schema and data mismatches during QA or CI triage.
Validation notes
- Schema compile errors can indicate invalid schema JSON or unsupported keywords.
- Use required fields and explicit types to catch omissions early.
- This validator runs with relaxed strictness for practical debugging sessions.
FAQ
- Which JSON Schema drafts are supported?
- AJV supports modern drafts including 2020-12 and earlier compatibility modes.
- Why do I sometimes get generic errors?
- Generic messages usually appear when schema compilation fails before data validation begins.
- Is my JSON sent to a server?
- No. Validation runs locally in your browser.
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