Convert TOML to C# online, free. TOML is a readable configuration format built around key/value pairs and tables. C# classes model data for .NET with System.Text.Json support. TOML to C# 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 emits ready-to-use C# types with System.Text.Json attributes following the C# language reference 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 .NET APIs, desktop apps and Azure functions.
It maps the full structure of your TOML onto idiomatic C# types, following the C# language reference conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste TOML and generate C# types from C# 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 C#, including nested types and optional fields.
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 C# equivalent:
TOML input:
host = "db.internal"
port = 5432
secure = trueOutput:
public class Server
{
public string Host { get; set; }
public int Port { get; set; }
public bool Secure { get; set; }
}Paste your TOML into the editor and press "Convert to C#". The tool parses it against the TOML v1.0.0 grammar, then generates C# types following C# language reference 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 C# cleanly. TOML tables become nested C# types, and arrays-of-tables become lists.
Optional or nullable members in the generated C# are inferred from keys missing in some records of your TOML, following C# language reference. Include the optional fields in your sample so they are typed correctly.
TOML (Tom's Obvious Minimal Language) (TOML) — TOML is a readable configuration format built around key/value pairs and tables. C# classes (C#) — C# classes model data for .NET with System.Text.Json support. This converter maps the structure of your TOML onto C# so you can use it for .NET APIs.
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 C# accurate.
Yes. The entire TOML-to-C# 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 C# is ready for .NET APIs, desktop apps and Azure functions. Copy or download it and drop it straight into your codebase.
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