YAML to TOML Converter

You’re migrating a project’s configuration from YAML to TOML — maybe for a Rust project using Cargo.toml, a Python project with pyproject.toml, or a Hugo site config. Both formats are human-readable, but they have different syntax for tables, arrays, and nested structures.

What This Tool Does

Paste YAML and get valid TOML output instantly. The converter maps YAML mappings to TOML tables, sequences to TOML arrays, and handles nested structures with proper TOML table headers.

Everything runs in your browser. Your data never leaves your device.

When to Use This

• Rust projects — convert YAML configs to TOML for Cargo, Shuttle, or other Rust tooling
• Python packaging — migrate setup.yaml or CI configs to pyproject.toml format
• Hugo/Zola sites — convert YAML front matter or config to TOML
• Configuration standardization — unify config files across projects to TOML format

FAQ

How are YAML sequences converted?

YAML sequences become TOML arrays. Arrays of objects use TOML’s [[array]] table syntax.

Does this send my data to a server?

No. All conversion happens entirely in your browser.