YAML ↔ TOML Converter
Convert between YAML and TOML configuration formats. Bridge Kubernetes, Docker Compose, and CI YAML with Cargo.toml and pyproject.toml. Runs entirely in your browser.
YAML and TOML: Bridging Two Config Worlds
YAML and TOML are both human-friendly configuration formats, but they grew up in different ecosystems. YAML dominates infrastructure and CI/CD — Kubernetes manifests, Docker Compose, GitHub Actions, and Ansible all use it. TOML rules modern language tooling — Rust's Cargo.toml, Python's pyproject.toml, and many CLI tools. Converting between them lets you reuse configuration across these worlds without rewriting it by hand.
Why Convert YAML to TOML?
- Standardising on TOML — moving a project's config to
pyproject.tomlor a TOML-based tool while keeping existing YAML data. - Less ambiguity — TOML's explicit types and required quoting avoid YAML's famous "Norway problem" where
nobecomesfalse. - Cleaner nested config — TOML's
[section]headers can be easier to scan than deep YAML indentation.
Why Convert TOML to YAML?
- Feeding CI/CD tools — most pipeline and orchestration tools expect YAML.
- Templating — many template engines and Helm charts operate on YAML.
- Consistency — keeping an entire repo's config in one format.
How It Works & What to Watch For
The converter parses your input into an in-memory object and re-serializes it in the target format, all locally in your browser. A few things to keep in mind: TOML requires a top-level table, so a YAML document whose root is a list can't be expressed as TOML directly. Comments are not carried across (neither format preserves the other's comments). And TOML's native dates become plain strings in YAML. For everything else — nested tables, arrays, arrays of tables, and all scalar types — the round-trip is faithful.