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gRPC .proto ⇄ JSON Schema

Bridge protobuf and JSON Schema definitions.

Runs in your browser
.proto · source
lines: 9chars: 138size: 138 B
JSON Schema · result
lines: 25chars: 375size: 375 B
live

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Understanding · Two schema languages — one for wire, one for validation.

この詳細な解説章は現在、英語版のみで提供されています。上の変換ツールはあなたの言語で動作しますが、長文の解説記事はまだ翻訳されていません。

よくある質問

Quick answers.

How are protobuf types mapped to JSON Schema?

The converter follows standard proto3 mapping conventions. For example, `string` and `bytes` become `string` types in JSON Schema, while numeric types like `int32` are mapped to `number` or `integer` with range constraints.

Is my API schema sent to a server?

No. The parsing and transformation logic is executed locally using JavaScript in your browser, keeping your protobuf definitions confidential.

Can I convert from JSON Schema back to .proto?

Yes, the tool is bidirectional. You can paste a JSON Schema to generate equivalent protobuf message definitions, though documentation tags and specific gRPC service options may require manual adjustment.

Does it support nested messages and enums?

Yes. The tool recursively processes nested messages, enums, and `oneof` fields into their corresponding `definitions` or `anyOf` representations in JSON Schema.

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