YAML to TOML Converter Online

What Is a YAML to TOML Converter?

A YAML to TOML converter transforms YAML configuration documents into Tom's Obvious Minimal Language format. YAML is the dominant configuration format in the Kubernetes and DevOps ecosystem, while TOML is standard for Rust's Cargo, Python's pyproject.toml, and various application configuration files. Converting between them is necessary when porting projects across ecosystems or when tools require a specific configuration format.

This converter parses YAML input using the js-yaml library for full spec compliance, builds an intermediate object representation, and then serializes it into TOML with proper section headers, typed key-value pairs, and clean formatting. YAML mappings become TOML sections, sequences become arrays, and scalar values are output with appropriate TOML type syntax. The entire process runs in your browser without server communication, keeping your configuration data private and secure.

How to Convert YAML to TOML

1. Paste your YAML configuration into the input panel. Kubernetes configs, Docker Compose files, or any valid YAML document is accepted.
2. Click Convert to parse the YAML structure and generate TOML with proper section headers and typed key-value pairs.
3. Review the TOML output showing bracket-enclosed section headers, properly quoted strings, and bare numeric and boolean values.
4. Copy or download the TOML file for use as Cargo.toml, pyproject.toml, or any application configuration file that requires TOML format.

Why Convert YAML to TOML with PinusX?

Developers porting configurations between cloud-native YAML tooling and TOML-based systems like Rust and Python need accurate format conversion. PinusX converts YAML to TOML with 100% client-side processing, ensuring your deployment configurations, service definitions, and build parameters never leave your browser. This is essential when converting files that reference internal services, contain authentication credentials, or describe proprietary infrastructure architectures.

Frequently Asked Questions

How are YAML sequences converted to TOML?

YAML sequences of scalar values become TOML inline arrays like [1, 2, 3]. Sequences of mappings are converted to TOML arrays of tables using the [[section]] syntax, which groups related configuration entries.

Are YAML anchors and aliases supported?

Yes. YAML anchors and aliases are resolved during parsing by the js-yaml library. The referenced content is expanded inline, and the resulting TOML output contains the fully resolved values without any reference syntax.

Can I convert Docker Compose YAML to TOML?

You can convert Docker Compose YAML to TOML for data representation purposes. However, Docker Compose specifically requires YAML format, so the TOML output would be for reference or porting to other tools rather than direct use with Docker Compose.

Does the converter handle deeply nested YAML?

Yes. Deeply nested YAML mappings are converted to TOML using dotted section headers. For example, a YAML structure like server: database: host: becomes [server.database] with a host key in the TOML output.

Is my YAML data kept private?

Yes. The entire YAML to TOML conversion runs locally in your browser using JavaScript. No YAML data is transmitted to any server, ensuring your configurations, secrets, and infrastructure details remain completely private.

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