JSON type inference tree
ClientPaste sample JSON and read an inferred type tree—nested objects, array element shapes, and primitive fields—before you open a codegen or schema tool.
Nearby workflows on Toolcore
- JSON Schema validate — Validate JSON against a schema, infer draft-07 schema from data—Ajv in browser. once JSON text parses on this page.
- Compare JSON shapes — Compare inferred shapes of two JSON samples—added paths, missing fields, type changes—local. once JSON text parses on this page.
- JSON formatter — JSON format online: pretty-print, minify, validate, escape, download . once JSON text parses on this page.
Common use cases
- Skim API response shapes during integration without writing TypeScript yet.
- Compare two fixture files with the schema compare tool after inferring types.
- Document expected payload fields for reviewers who do not read OpenAPI.
Common mistakes to avoid
Treating inference as JSON Schema
This shows types from one sample. Optional fields and unions need more samples or a schema validate pass.
FAQ
How are arrays handled?
Array item types come from the first element—same heuristic as the JSON → TypeScript generators.
Common search terms
Phrases people search for that match this tool. See the full long-tail keyword index.
- infer json types online
- json type tree from sample
- json schema inference preview
More tools
Related utilities you can open in another tab—mostly client-side.
JSON Schema validate
ClientValidate JSON against a schema, infer draft-07 schema from data—Ajv in browser.
Compare JSON shapes
ClientCompare inferred shapes of two JSON samples—added paths, missing fields, type changes—local.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.