- Paste JSON data and schema.
- Click Validate.
- Fix any reported errors.
JSON Schema Validator
Validate JSON against a schema to ensure correct structure.
How to Use This Tool
Learn More About JSON Schema Validator
Why validate JSON?
Schema validation protects APIs and configuration files by ensuring incoming JSON matches expectations.
About JSON Schema Validator
Validating JSON with a schema prevents breaking changes and ensures data consistency. This tool checks your JSON against a schema and reports any mismatches so you can fix issues quickly.
Validate JSON data against a schema.
- Runs in browser
- Yes
- Schema support
- Core fields
- Output
- Error list
Examples
Validate a user payload
Check a user object against a simple schema.
Input
Data: {"id":1,"name":"Ava"}
Schema: {"type":"object",...}Output
Valid against schema.
Features
Schema validation
Check type, required fields, and array rules.
Readable errors
Get a list of validation errors with paths.
Client-side
Runs in the browser for privacy.
Use Cases
- Validate API request and response payloads.
- Check configuration files for correctness.
- Prevent schema drift during development.
Frequently Asked Questions
Related Tools
Generate a schema first, then validate your data.