TOML to YAML Converter
Convert TOML 1.0 configuration such as Cargo.toml or pyproject.toml to YAML.
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How to Convert TOML to YAML
Paste a TOML file and it is parsed as TOML 1.0, then written as two-space block YAML. Table headers become nested mappings, arrays of tables become sequences, and scalar types are preserved so numbers stay numbers and booleans stay booleans.
Why Convert Between Config Formats
Different ecosystems settled on different formats: Rust and modern Python tooling on TOML, Kubernetes and CI systems on YAML. Migrating a project between them, or generating one from the other during a build, means translating configuration rather than rewriting it by hand. Converting also makes a structural comparison possible, since the same data in one format is far easier to diff.
Frequently Asked Questions
Which TOML files does this handle?
Any TOML 1.0 document: Cargo.toml, pyproject.toml, Netlify and Hugo configuration, and Rust or Python tooling config. Tables, inline tables, arrays of tables, and typed dates all convert.
How do TOML dates appear in YAML?
TOML has real date and date-time types. They are converted to the equivalent YAML timestamp text, which a YAML 1.2 parser reads back as a string unless the consuming schema coerces it - worth checking if a downstream tool expects a date object.
What happens to arrays of tables?
A [[bin]] style array of tables becomes a YAML sequence of mappings under the same key, which is the natural YAML equivalent.
Are comments preserved?
No. The document is converted through its data model, so comments are dropped. This is stated plainly because tools that claim otherwise usually just move a few of them and lose the rest.
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