TOML to YAML Converter

Convert TOML to YAML in your browser. Turn Cargo.toml-style config into YAML for CI and Kubernetes tooling. Free, private, instant.

TOML inputpaste, type, or drop a file
YAML output
Runs 100% in your browser. Nothing is uploaded, logged, or stored, and there are no ads. Verify it yourself: open your browser's Network tab while you convert and watch that no requests leave this page.

About this tool

Convert TOML documents to YAML, the direction you need when YAML-based tooling (Helm, Ansible, CI systems) needs values that currently live in a TOML file.

Tables become nested mappings, arrays of tables become YAML lists, and TOML datetimes are rendered as ISO strings. Comments are dropped, since neither format can round-trip the other's comments.

Common uses

  • Reuse TOML config values inside a Helm values.yaml or Ansible vars file.
  • Convert a netlify.toml or similar into YAML for comparison with other configs.
  • Migrate a project's config format without retyping.

Automate via API

The same conversion is available as a REST endpoint for scripts, pipelines, and backends:

curl -X POST https://payloadly.com/api/v1/tools/toml-to-yaml \
  -H "Content-Type: text/plain" \
  -H "X-Api-Key: YOUR_API_KEY" \
  --data-binary @input.toml

API documentation · Get an API key

TOML notes

TOML (Tom's Obvious, Minimal Language) is the config format of choice for Rust (Cargo.toml), Python (pyproject.toml), and many modern CLIs. It maps cleanly to a hash table and supports first-class dates and comments.

  • TOML documents must have a table (object) at the top level, never an array.
  • TOML has first-class date/time types that JSON must represent as strings.
  • TOML values cannot be null; null fields are omitted when converting into TOML.

YAML notes

YAML is a human-friendly superset of JSON used heavily in Kubernetes manifests, GitHub Actions workflows, Docker Compose files, and CI/CD pipelines. Indentation is structural, and unquoted scalars are type-coerced.

  • Indentation defines structure; tabs are not allowed for indentation.
  • Unquoted values like `no`, `on`, or `1.0` may be coerced to booleans or numbers.
  • Comments (`# ...`) cannot survive a round-trip through JSON.

Frequently asked questions

Is my data uploaded to a server?

No. This tool runs entirely in your browser using JavaScript, and there are no ads on the page. Nothing you paste or drop here is uploaded, logged, or stored, and you can verify that yourself: open your browser's developer tools and watch the Network tab while you convert (no requests leave the page), or disconnect from the internet after the page loads and keep working.

What should I watch out for when converting TOML to YAML?

TOML documents must have a table (object) at the top level, never an array. TOML has first-class date/time types that JSON must represent as strings. Indentation defines structure; tabs are not allowed for indentation. Unquoted values like `no`, `on`, or `1.0` may be coerced to booleans or numbers.

Is there a size limit or a fee?

The browser tool is free with no signup and comfortably handles files up to tens of megabytes (limited by your device's memory). For automated or bulk processing inside your own scripts and pipelines, use the paid REST API.

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