Convert TOML to TypeScript online, free. TOML is a readable configuration format built around key/value pairs and tables. TypeScript interfaces give compile-time types for data crossing your app. TOML to TypeScript 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 TypeScript types as interfaces with optional members following the TypeScript Handbook 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 typed API clients, React/Next.js props and shared front/back types.
It maps the full structure of your TOML onto idiomatic TypeScript types, following the TypeScript Handbook 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 TypeScript types from TypeScript 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 TypeScript, 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 TypeScript equivalent:
TOML input:
host = "db.internal"
port = 5432
secure = trueOutput:
interface Server {
host: string;
port: number;
secure: boolean;
}Paste your TOML into the editor and press "Convert to TypeScript". The tool parses it against the TOML v1.0.0 grammar, then generates TypeScript types following TypeScript Handbook 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 TypeScript cleanly. TOML tables become nested TypeScript types, and arrays-of-tables become lists.
Optional or nullable members in the generated TypeScript are inferred from keys missing in some records of your TOML, following TypeScript Handbook. 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. TypeScript interfaces (TypeScript) — TypeScript interfaces give compile-time types for data crossing your app. This converter maps the structure of your TOML onto TypeScript so you can use it for typed API clients.
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 TypeScript accurate.
Yes. The entire TOML-to-TypeScript 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 TypeScript is ready for typed API clients, React/Next.js props and shared front/back types. Copy or download it and drop it straight into your codebase.
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