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JSON schema sample generator

Generate seeded sample documents from a JSON Schema plus boundary edge cases, and re-validate every output against that schema.

Paste a schema to generate sample documents.

Honesty about the re-validation loop: every document is checked against your schema with a local keyword-subset validator, not Ajv. It checks type, enum, const, required, properties and item bounds, string lengths and patterns, numeric bounds with exclusives and multiples, allOf, anyOf, oneOf, not, and common formats; anything else your schema uses is ignored and listed in the notes. Remote references are never fetched. YAML input accepts plain block mappings and sequences; anchors, aliases, tags, and block scalars are refused. A sample that fails validation is shown as failing, with the reason, because that is what the generator produced.
Options

More regex & cron tools

- JSON schema validator (/json/schema)
- JSON schema generator (/json/schema-generator)
- JSON validator (/json/validator)
All regex & cron tools (/dev)

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Canonical HTML: https://nutter.tools/dev/json-schema-sample-generator
Markdown version: https://nutter.tools/dev/json-schema-sample-generator.md
Plain-text version: https://nutter.tools/dev/json-schema-sample-generator.txt
Agent index: https://nutter.tools/llms.txt