JSON to JSON Schema Converter
Free JSON to JSON Schema converter — infer a JSON Schema from any JSON sample, in your browser. Powered by quicktype.
Runs entirely in your browser — nothing you enter is uploaded or stored.
JSON to JSON Schema Converter
Free JSON to JSON Schema converter — infer a JSON Schema from any JSON sample, in your browser. Powered by quicktype.
Paste your JSON on the left and the JSON Schema is produced instantly on the right — right in your browser. There’s no upload step: your data never leaves the page, which you can confirm from the Network panel or our privacy policy.
Type inference works best with a complete, representative JSON sample. Include every field you expect (and at least one element of each array) so the generated JSON Schema covers your real data.
Credits
This tool is powered by open-source libraries that run in your browser:
- quicktype-core — JSON → typed code generation (Apache-2.0)
Frequently asked questions
How do I convert JSON to JSON Schema?
Paste or type your JSON in the left editor (or use Sample / Upload / URL). The JSON Schema appears instantly on the right — copy or download it. Everything runs in your browser.
Is my data uploaded anywhere?
No. This converter runs entirely in your browser — your JSON is never sent to a server. You can verify it in the Network tab or in our Content-Security-Policy.
Does the generated JSON Schema handle nested objects and arrays?
Yes — types are inferred from your whole JSON sample, including nested objects and arrays. Paste a representative example with every field for best results.