Protobuf to JSON Schema
Convert proto3 definitions to JSON Schema, TypeScript interfaces, and sample JSON. Supports messages, enums, nested types, oneof, map, repeated.
Protobuf to JSON Schema
Convert Protocol Buffer (proto3) definitions to JSON Schema, TypeScript interfaces, and sample JSON. Paste your .proto file and get instant, accurate conversions.
Protobuf Input
Frequently Asked Questions
What is the Protobuf to JSON Schema?
The Protobuf to JSON Schema is a free online tool that convert proto3 definitions to json schema, typescript interfaces, and sample json. supports messages, enums, nested types, oneof, map, repeated.. It runs entirely in your browser with no installation or sign-up needed.
What features?
Proto3: messages, enums, nested messages, repeated, optional, oneof, map fields, all scalar types.
Output formats?
Three: JSON Schema (Draft-07 with $ref), TypeScript interfaces, and sample JSON with placeholder values.
How are int64 types handled?
Mapped to string in both JSON Schema and TypeScript, following the standard protobuf JSON mapping convention for 64-bit integers.
Is the Protobuf to JSON Schema free to use?
Yes, the Protobuf to JSON Schema is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Is my data safe with this tool?
Absolutely. The Protobuf to JSON Schema processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the Protobuf to JSON Schema work on mobile devices?
Yes, the Protobuf to JSON Schema is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Protobuf to JSON Schema in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
What programming languages or formats does this support?
The Protobuf to JSON Schema supports a wide range of popular formats and languages. Check the tool interface for the full list of supported options.
How do I use the Protobuf to JSON Schema?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
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About Protobuf to JSON Schema
Protobuf to JSON Schema is a free, browser-based tool in our Developer Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.