Online JSON Schema Generator
Infer JSON Schema draft specifications from JSON instances with automatic type detection and required field inference.
How It Works
Fast, secure, browser-native JSON processing in 3 simple steps
Paste or Upload JSON
Paste your raw data directly into the editor or upload any .json, .jsonc, or .json5 file.
Inspect & Validate
Instantly view syntax errors, health score, duplicate keys, and potential sensitive credentials.
Format, Diff or Export
One-click format, run structural comparisons, generate redacted copies, or download the clean output.
Infer Strict JSON Schemas from Example Data
Quickly infer JSON Schema definitions from real-world API responses and database documents to validate requests in OpenAPI, Fastify, Ajv, or API gateways.
Frequently Asked Questions
Everything you need to know about JSON validation, formatting, and privacy
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