TOML → YAML

Converts TOML into YAML.

TOML to YAML converts a TOML document into equivalent YAML directly in your browser. Paste a config file such as a Cargo.toml or pyproject.toml and get YAML output you can drop into another tool or pipeline. It's handy whenever you need to move configuration between formats without writing a conversion script.

Common uses

• Convert a Rust Cargo.toml or Python pyproject.toml into YAML for a tool that expects YAML config
• Migrate application settings from TOML to a YAML-based config format
• Inspect how TOML tables, arrays, and dates map onto YAML structure
• Generate YAML fixtures or examples from existing TOML during development
• Quickly reformat a snippet of TOML as YAML while reading documentation or debugging

FAQ

Is my data sent to a server?

No. The conversion runs entirely in your browser using JavaScript, and nothing you paste is uploaded or stored on a server.

What happens if my TOML is invalid?

The tool reports an error message describing the parse failure instead of producing output. Fix the reported syntax issue in the TOML and the conversion will run.

How are TOML tables and arrays represented in the YAML output?

TOML tables become nested YAML mappings and TOML arrays become YAML sequences. The structure mirrors the parsed TOML value tree.

Are TOML dates and times preserved?

TOML date and time values are parsed by the TOML reader and then serialized into the YAML output, so they carry through the conversion.

Does an empty input produce an error?

No. If the input is empty or only whitespace, the tool simply returns an empty result rather than an error.

Related tools

• JSON → TOML
• JSON → YAML
• TOML Formatter
• TOML → JSON
• YAML Formatter
• YAML → JSON
• YAML → TOML
• YAML Validator