Free · Browser-only · 149 of 149 converters live

Convert any schema to any code.

Paste a JSON, JSON Schema, OpenAPI, GraphQL SDL, SQL DDL, Protobuf, Prisma or TypeScript sample. Get TypeScript, Zod, Pydantic, Go, Rust, Swift, Kotlin, and more — generated entirely in your browser.

Try JSON → TypeScript JSON → Zod Browse all Changelog

Start here

Search-backed starting points

Google Trends points to these broader developer tasks before the narrower long-tail converters.

Most searched starting point

JSON -> TypeScript

Turn API responses and fixtures into interfaces before choosing validation.

Runtime validation

Use Zod validation for API responses, forms, env vars, and tRPC inputs.

JSON -> Go struct

A direct path for the JSON to Go / JSON to Go struct search intent.

OpenAPI -> TypeScript

Extract clean types from a spec without setting up a full client generator.

All converters

10 inputs × 15 outputs

Browse by input:JSON JSON Schema OpenAPI GraphQL SQL DDL Protocol Buffers Avro TypeScript Mongoose Schema Prisma Schema

149 matches

JSON → TypeScript

JSON → Pydantic

JSON → Python dataclass

JSON → Go struct

JSON → Rust struct

JSON → Kotlin data class

JSON → Swift struct

JSON → Dart class

JSON → Java POJO

JSON → C# record

JSON → PHP class

JSON → Ruby class

JSON Schema → TypeScript

JSON Schema → Zod

JSON Schema → Yup

JSON Schema → Joi

JSON Schema → Pydantic

JSON Schema → Python dataclass

JSON Schema → Go struct

JSON Schema → Rust struct

JSON Schema → Kotlin data class

JSON Schema → Swift struct

JSON Schema → Dart class

JSON Schema → Java POJO

JSON Schema → C# record

JSON Schema → PHP class

JSON Schema → Ruby class

OpenAPI → TypeScript

OpenAPI → Zod

OpenAPI → Yup

OpenAPI → Joi

OpenAPI → Pydantic

OpenAPI → Python dataclass

OpenAPI → Go struct

OpenAPI → Rust struct

OpenAPI → Kotlin data class

OpenAPI → Swift struct

OpenAPI → Dart class

OpenAPI → Java POJO

OpenAPI → C# record

OpenAPI → PHP class

OpenAPI → Ruby class

GraphQL → TypeScript

GraphQL → Zod

GraphQL → Yup

GraphQL → Joi

GraphQL → Pydantic

GraphQL → Python dataclass

GraphQL → Go struct

GraphQL → Rust struct

GraphQL → Kotlin data class

GraphQL → Swift struct

GraphQL → Dart class

GraphQL → Java POJO

GraphQL → C# record

GraphQL → PHP class

GraphQL → Ruby class

SQL DDL → TypeScript

SQL DDL → Zod

SQL DDL → Yup

SQL DDL → Joi

SQL DDL → Pydantic

SQL DDL → Python dataclass

SQL DDL → Go struct

SQL DDL → Rust struct

SQL DDL → Kotlin data class

SQL DDL → Swift struct

SQL DDL → Dart class

SQL DDL → Java POJO

SQL DDL → C# record

SQL DDL → PHP class

SQL DDL → Ruby class

Protocol Buffers → TypeScript

Protocol Buffers → Zod

Protocol Buffers → Yup

Protocol Buffers → Joi

Protocol Buffers → Pydantic

Protocol Buffers → Python dataclass

Protocol Buffers → Go struct

Protocol Buffers → Rust struct

Protocol Buffers → Kotlin data class

Protocol Buffers → Swift struct

Protocol Buffers → Dart class

Protocol Buffers → Java POJO

Protocol Buffers → C# record

Protocol Buffers → PHP class

Protocol Buffers → Ruby class

Avro → TypeScript

Avro → Pydantic

Avro → Python dataclass

Avro → Go struct

Avro → Rust struct

Avro → Kotlin data class

Avro → Swift struct

Avro → Dart class

Avro → Java POJO

Avro → C# record

Avro → PHP class

Avro → Ruby class

TypeScript → Zod

TypeScript → Yup

TypeScript → Joi

TypeScript → Pydantic

TypeScript → Python dataclass

TypeScript → Go struct

TypeScript → Rust struct

TypeScript → Kotlin data class

TypeScript → Swift struct

TypeScript → Dart class

TypeScript → Java POJO

TypeScript → C# record

TypeScript → PHP class

TypeScript → Ruby class

Mongoose Schema → TypeScript

Mongoose Schema → Zod

Mongoose Schema → Yup

Mongoose Schema → Joi

Mongoose Schema → Pydantic

Mongoose Schema → Python dataclass

Mongoose Schema → Go struct

Mongoose Schema → Rust struct

Mongoose Schema → Kotlin data class

Mongoose Schema → Swift struct

Mongoose Schema → Dart class

Mongoose Schema → Java POJO

Mongoose Schema → C# record

Mongoose Schema → PHP class

Mongoose Schema → Ruby class

Prisma Schema → TypeScript

Prisma Schema → Zod

Prisma Schema → Yup

Prisma Schema → Joi

Prisma Schema → Pydantic

Prisma Schema → Python dataclass

Prisma Schema → Go struct

Prisma Schema → Rust struct

Prisma Schema → Kotlin data class

Prisma Schema → Swift struct

Prisma Schema → Dart class

Prisma Schema → Java POJO

Prisma Schema → C# record

Prisma Schema → PHP class

Prisma Schema → Ruby class

Why Schemato

• 100% client-side. Your schema never leaves your browser.
• Zero signup, zero ads in the conversion area.
• One source of truth — copy generated types straight into your repo.
• Open structure: missing a converter? Open an issue and it'll likely ship next week.

License

Last commit

Open issues

149/149 live converters

Latest from the changelog

Schemato is built in public. New features ship every few days.

Multi-sample JSON inference

2026-06-08

• JSON converters now accept newline-delimited JSON samples and merge them into one shared shape.
• Fields missing from some samples are emitted as optional across TypeScript, Zod, Go, Pydantic, Rust, Swift, Kotlin, Java, C#, Dart, PHP, Ruby, Yup, Joi, and dataclass outputs.

Comparison pages for developer-tool discovery

2026-06-08

• Published /compare/transform-tools to explain when Schemato is a better fit for schema-to-code workflows.
• Updated the sitemap so the new comparison page can be discovered alongside quicktype and json2ts comparisons.

Search-backed JSON guides

2026-05-26

• Published /guides/json-to-typescript for the broad json to typescript search intent.
• Published /guides/json-to-go-struct for the broad json to go / json to go struct search intent.

Guides

Long-form, copy-paste-friendly walkthroughs.

Infer optional fields from multiple JSON samples

Paste NDJSON API responses and generate a safer shared type.

How to convert JSON to TypeScript types

Turn a real API response into interfaces, then decide when runtime validation should come next.

How to convert JSON to a Zod schema

From a raw JSON sample to a validated, typed schema you can reuse in fetch, forms, and tRPC.

How to convert JSON to a Go struct

Generate Go structs from JSON, then polish pointers, slices, time fields, and json tags.

Compare alternatives

Practical comparisons for teams choosing a browser-based schema converter.

Schemato vs quicktype

Mature CLI and model generation vs browser-first validation output.

Schemato vs json2ts

Focused JSON-to-TypeScript tools vs a multi-format converter matrix.

Schemato vs transform.tools

Broad transform toolbox vs dedicated schema-to-code workflows.