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JSON Schema Generator
Generate a Draft-07 JSON Schema from one sample document with explicit required fields and heterogeneous array shapes.
Pasted JSON, One UTF-8 JSON file
generated-schema.json, schema-generation-report.json
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the input and explicit options shown. A selected UTF-8 file wins its corresponding pasted text.
- Select Generate JSON Schema and inspect the complete stated conventions.
- Download generated-schema.json, schema-generation-report.json.
Examples
[1,"x"] produces distinct integer/string item schemas in anyOf.
Limitations
- At most1 MiB UTF-8,depth30,50000 input values,10000 generated shapes,5 MiB cumulative shape signatures/combined artifacts and30 seconds.
- One sample only: root arrays remain arrays. Observed object fields are required and additionalProperties is true. Arrays deduplicate complete per-item shapes without property merging.
- Draft-07 canonical identifier is http://json-schema.org/draft-07/schema#. No format/definition/2020 inference or guarantee about unseen documents. Required lists/signatures use UTF-16 order; default artifact object serialization keeps ordinary integer-like key enumeration.
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