JSON to Schema Converter — 20+ Formats
Paste JSON to instantly generate production-ready schemas for 20+ languages and frameworks. Web Worker-powered, everything runs locally.
💡Help shape DevUtils.lol
No black-box support tickets. DevUtils.lol is built for you. Report bugs directly to our public repo, or come hang out with other devs in the community.
Frequently Asked Questions
20+ formats: Prisma, Mongoose, SQL (CREATE TABLE), Go Struct, TypeScript Interface, Zod, Joi, Yup, Rust (Serde), Swift (Codable), Flutter (json_serializable), Django Models, Python Pydantic, and JSON Schema.
Yes. Nested objects become related models/structs/interfaces with proper relationships. Arrays of objects generate nested schemas automatically.
Yes. As you type or paste JSON, the schema generates instantly with a 300ms debounce. A Web Worker handles the conversion so the UI never freezes.
Yes. The output is production-ready with proper types, required fields, imports, and relationships. Copy, download, or paste directly into your project.
Yes. Drop any .json file and the Web Worker processes it off the main thread. The UI stays responsive even for multi-MB files.
All conversion runs in your browser via Web Workers. Your JSON data never leaves your device.