Convert TOML to Protocol Buffers online, free. TOML is a readable configuration format built around key/value pairs and tables. Protocol Buffers is a compact, typed binary serialization format with generated stubs. TOML to Protocol Buffers conversion parses your TOML against the TOML v1.0.0 grammar (https://toml.io/en/v1.0.0), builds an in-memory model of its keys, nested objects and arrays, then derives a Protocol Buffers that describes that shape following the Protocol Buffers (proto3) conventions. Processing runs in your browser in JavaScript with no upload or server round-trip — no size limit beyond your device's memory, so multi-megabyte documents convert in milliseconds and sensitive payloads never leave your machine. Typical uses include gRPC service definitions, high-throughput messaging and cross-language RPC.
It maps the full structure of your TOML onto a valid Protocol Buffers, following the Protocol Buffers (proto3) conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste TOML and derive a Protocol Buffers from Protocol Buffers immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.
Nested TOML objects, tables and arrays are mapped faithfully onto Protocol Buffers.
Your TOML never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.
Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.
A TOML document and its Protocol Buffers equivalent:
TOML input:
name = "Alice"
age = 30
email = "[email protected]"Output:
message User {
string name = 1;
int32 age = 2;
optional string email = 3;
}Paste your TOML into the editor and press "Convert to Protocol Buffers". The tool parses it against the TOML v1.0.0 grammar, then derives a Protocol Buffers following Protocol Buffers (proto3) conventions — instantly and entirely in your browser. You can validate or format the TOML first to be sure it is clean.
TOML values are typed and it has first-class dates and times, so they carry into Protocol Buffers cleanly. TOML tables become nested Protocol Buffers structures, and arrays-of-tables become lists.
The derived Protocol Buffers records the required keys and the value type of each field seen in your TOML sample. Widen it by hand if some fields are optional or can hold more than one type.
TOML (Tom's Obvious Minimal Language) (TOML) — TOML is a readable configuration format built around key/value pairs and tables. Protocol Buffers (protobuf) messages (Protocol Buffers) — Protocol Buffers is a compact, typed binary serialization format with generated stubs. This converter maps the structure of your TOML onto Protocol Buffers so you can use it for gRPC service definitions.
Yes. Invalid TOML is flagged with a clear error before anything is converted. Common TOML problems to check are correct key/value pairs, quoted strings, and valid [table] headers. Starting from clean input keeps the generated Protocol Buffers accurate.
Yes. The entire TOML-to-Protocol Buffers conversion runs locally in your browser in JavaScript — your TOML is never uploaded, logged or stored. That matters when the data is something like Rust Cargo & Python pyproject config, which should not leave your machine.
The generated Protocol Buffers is ready for gRPC service definitions, high-throughput messaging and cross-language RPC. Copy or download it and drop it straight into your validation or codegen pipeline.
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