YAML to TOML Converter
Turn a YAML configuration object into TOML you can copy or download, entirely in your browser.
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How to use
- Paste a YAML object up to 100,000 characters.
- Convert it and review the TOML output or any boundary error.
- Copy the TOML or download it as a .toml file.
Defined YAML and TOML boundaries
The YAML root must be a mapping. Strings, booleans, finite numbers, arrays, and nested mappings are supported; null values are rejected because TOML has no native null type. YAML aliases and standard scalar parsing are handled by the local YAML parser.
Keys, depth, and local processing
Bare TOML keys use letters, numbers, underscores, or hyphens. Other YAML key names are quoted. Nested values are limited to eight levels to keep output readable and bounded. Parsing, conversion, copying, and download preparation happen in your browser.
Frequently asked questions
You may also want to know
Can I convert a top-level YAML sequence?
No. TOML documents require named keys, so the YAML root must be a mapping.
Why is null rejected?
TOML has no native null value. Replace null with a concrete value or remove that key before converting.
Are nested mappings supported?
Yes. They are emitted as inline tables up to eight nested levels, and keys with punctuation are quoted.