Convert TOML to Ruby online, free. TOML is a readable configuration format built around key/value pairs and tables. Ruby keyword-init Structs give lightweight, typed-by-convention value objects. TOML to Ruby 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 Ruby types following the Ruby Struct 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 Rails & Sinatra apps, API response objects and config and DTOs.
It maps the full structure of your TOML onto idiomatic Ruby types, following the Ruby Struct 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 Ruby types from Ruby 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 Ruby, 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 Ruby equivalent:
TOML input:
host = "db.internal"
port = 5432
secure = trueOutput:
Server = Struct.new(:host, :port, :secure, keyword_init: true)Paste your TOML into the editor and press "Convert to Ruby". The tool parses it against the TOML v1.0.0 grammar, then generates Ruby types following Ruby Struct 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 Ruby cleanly. TOML tables become nested Ruby types, and arrays-of-tables become lists.
Optional or nullable members in the generated Ruby are inferred from keys missing in some records of your TOML, following Ruby Struct. 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. Ruby structs (Ruby) — Ruby keyword-init Structs give lightweight, typed-by-convention value objects. This converter maps the structure of your TOML onto Ruby so you can use it for Rails & Sinatra apps.
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 Ruby accurate.
Yes. The entire TOML-to-Ruby 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 Ruby is ready for Rails & Sinatra apps, API response objects and config and DTOs. Copy or download it and drop it straight into your codebase.
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