TOML to YAML Converter Online

What Is a TOML to YAML Converter?

A TOML to YAML converter transforms Tom's Obvious Minimal Language configuration files into YAML format. Both TOML and YAML are human-readable configuration languages, but they serve different ecosystems. TOML is standard for Rust (Cargo.toml), Python (pyproject.toml), and Hugo, while YAML dominates the cloud-native space with Kubernetes, Docker Compose, Ansible, and CI/CD pipelines.

This converter parses TOML sections and key-value pairs into an intermediate JavaScript object, then serializes that object as properly indented YAML. TOML sections become YAML mappings, arrays become sequences, and typed values are preserved throughout the conversion. The two-step pipeline ensures accurate representation of your configuration structure. All processing runs in your browser with no server involvement, keeping your configuration files private.

How to Convert TOML to YAML

1. Paste your TOML content into the input panel. Any valid TOML file including Cargo.toml, pyproject.toml, or custom configuration is accepted.
2. Click Convert to parse TOML sections into YAML mappings with proper indentation and type preservation.
3. Review the YAML output showing section headers as YAML keys, nested sections as indented sub-keys, and values with appropriate YAML formatting.
4. Copy or download the YAML file for use in Kubernetes, Docker Compose, Ansible, or any YAML-based infrastructure tool.

Why Use PinusX TOML to YAML Converter?

Developers migrating between configuration ecosystems or maintaining multi-format projects need reliable format conversion. PinusX converts TOML to YAML with 100% client-side processing — your build configurations, deployment parameters, and application settings never leave your browser. This eliminates the security risks of server-based conversion tools, which is particularly important when converting configurations that contain registry credentials, API endpoints, and infrastructure secrets.

Frequently Asked Questions

Does TOML to YAML conversion preserve types?

Yes. TOML's typed values (strings, integers, floats, booleans) are preserved as their YAML equivalents. TOML integers become YAML integers, booleans remain booleans, and strings are represented with or without quotes as appropriate in YAML.

How are TOML comments handled?

TOML comments (lines starting with #) are not preserved in the YAML output. The converter parses TOML values and structure only. You can add YAML comments (also using #) to the output manually after conversion.

Can I convert Cargo.toml to YAML?

Yes. Paste your Cargo.toml content and the converter will produce a YAML representation of your Rust project configuration. This is useful for documentation, comparison with other tools, or integration into YAML-based CI/CD pipelines.

What about TOML's dotted keys?

TOML dotted keys like [app.settings] create nested YAML structures. The section 'app.settings' with key 'debug' becomes 'app:' with a nested 'settings:' containing 'debug:' in the YAML output, preserving the hierarchical structure.

Is this converter private?

Yes. All TOML to YAML conversion runs locally in your browser. Your configuration data is never sent to any server. The tool uses JavaScript parsing and serialization with zero network communication during the conversion process.

Your data never leaves your browser. 100% client-side processing.