Static-first
Astro static site. Conversion libraries load only on the converter pages, so the rest of the site stays light.
YAML ⇄ JSON ⇄ TOML, in your browser
Three formats, six pairs, one no-frills converter. Paste, see the result as you type, copy. Built for the developer who just wants the bracket-versus-indent question answered, fast.
Pick a direction
YAML → JSON
Most common: bring a Kubernetes manifest into a JSON-only tool.
Open →JSON → YAML
Reverse: turn an API response into something humans review.
Open →JSON → TOML
Cargo, pyproject.toml — share config between ecosystems.
Open →TOML → JSON
Read TOML in a JSON-only pipeline.
Open →YAML → TOML
Less common, but every now and then someone asks.
Open →TOML → YAML
Useful when migrating Rust configs to a YAML-driven tool.
Open →Private by design
Parsing happens in your browser. We never receive your config — not even for share URLs (we use the URL fragment).
More than a tool
Each format ships with a primer covering the gotchas (anchors, dates, comments — yes, JSON5).
Stable libraries
js-yaml for YAML, smol-toml for TOML, and the browser's own JSON. Pinned versions, no surprise upgrades.