Privacy
Do you allow measurement and integrations that are enabled for this host profile?
Schema declaration converter

Convert JSON Schema into TypeScript before code review

Paste a schema, choose a type name and generate reviewable TypeScript declarations. The MVP stays in the browser, blocks remote refs and treats generated output as plain text.

  • No remote refs
  • Local $defs refs
  • Plain text output

Type declaration workbench

Use curated presets or paste your own schema. The converter supports common object, array, enum, union, allOf and local ref patterns without importing Node-only tooling.

Ready to generate

Object schema with $defs, local refs, required properties and enum role values.

Schema input

Input chars
1274 / 61440
Output limit
122880
Worker timeout
4000 ms

Conversion result

Run the converter to see TypeScript declarations and safety diagnostics.

Use it as a schema review bridge

JSON Schema often starts in API contracts while TypeScript types live in application code. This playground makes the shape visible before copying declarations into a repository: required fields, optional fields, enum values, local refs, unions and index signatures are easy to inspect.

JSON Schema Example GeneratorAjv JSON Schema ValidatorZod Schema Playground

Boundaries of the MVP

The converter does not fetch remote refs, run arbitrary JavaScript, read files, execute CLI behavior or claim full draft 2020-12 compatibility. Unsupported validation keywords are surfaced as diagnostics so the generated declaration stays honest.