Convert TOML to YAML online, free. TOML is a readable configuration format built around key/value pairs and tables. YAML is an indentation-based superset of JSON favoured for human-edited config. TOML to YAML 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 re-serializes it as valid YAML following the YAML 1.2.2 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 Kubernetes & Docker Compose manifests, CI/CD pipelines and Ansible playbooks.
It maps the full structure of your TOML onto well-formed YAML, following the YAML 1.2.2 conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste TOML and convert YAML 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 YAML.
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 YAML equivalent:
TOML input:
name = "Alice"
age = 30
email = "[email protected]"Output:
name: Alice
age: 30
email: [email protected]Paste your TOML into the editor and press "Convert to YAML". The tool parses it against the TOML v1.0.0 grammar, then re-serializes it as YAML following YAML 1.2.2 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 YAML cleanly. TOML tables become nested YAML structures, and arrays-of-tables become lists.
Numbers, booleans and null are preserved as native YAML types wherever YAML supports them, so standard documents convert losslessly and can be read back into the same structure.
TOML (Tom's Obvious Minimal Language) (TOML) — TOML is a readable configuration format built around key/value pairs and tables. YAML (YAML Ain't Markup Language) (YAML) — YAML is an indentation-based superset of JSON favoured for human-edited config. This converter maps the structure of your TOML onto YAML so you can use it for Kubernetes & Docker Compose manifests.
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 YAML accurate.
Yes. The entire TOML-to-YAML 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 YAML is ready for Kubernetes & Docker Compose manifests, CI/CD pipelines and Ansible playbooks. Copy or download it and drop it straight into your tooling.
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