About
YAML to JSON is a free developer tool that converts YAML to JSON and JSON to YAML instantly in your browser. It uses real YAML 1.2 parsing, so anchors, aliases, merge keys, and multi-document files are handled correctly, with clear error messages and line numbers when something is wrong. It is built for the files developers work with every day, including app configs, CI pipelines, Kubernetes manifests, Docker Compose, GitHub Actions, and OpenAPI specs. Everything runs on your device, so configs and secrets are never uploaded or stored. It is free with no signup and no limits, and an optional account adds API access.