How it works
Turn sample JSON into a strict, valid JSON Schema (draft 2020-12).
Step 1
Paste sample JSON
Drop a representative payload on the home page — nested objects, arrays, and enums are fine.
Step 2
Draft + rule screen
JSONSchema drafts a 2020-12 schema and runs deterministic checks (type / required / format / enum).
Step 3
Review and export
Read plain-language field notes, tighten constraints, then copy JSON or CSV into your API pipeline.
Demo mode returns a labeled sample. Live runs use the same structure with your data. Output is decision-support — not a compliance certificate.