Developer preview
Schema playground
Validate a payload against a schema, or compare two schema revisions. Documents are processed in this tab and never uploaded.
Contract
JSON Schema 2020-12 or draft-07 · up to 512 KB
Data
Editable sample data · documents stay in this tab
Runs in this tab · nothing is uploaded
Ready when you are.
Load the example or paste your documents, then run a check.
Comparison is a conservative structural review, not a proof of API compatibility. Remote references are not fetched. Inputs are not persisted; reloading clears your changes. Read the limitations.