YAML Tools

YAML (YAML Ain't Markup Language) is designed for configuration files that humans write and maintain. Unlike JSON, YAML supports comments, multi-line strings and anchors — making it the format of choice for CI/CD pipelines (GitHub Actions, GitLab CI), container orchestration (Kubernetes, Docker Compose) and infrastructure-as-code (Ansible, Helm).

YAML's flexibility comes with a well-known gotcha: YAML 1.1 parsers used by Docker Compose, GitHub Actions and Ansible silently coerce bare yes, no, on and off to booleans, and time-like values like 22:30 to integers. The YAML Formatter's Fix YAML 1.1 Risks button detects and auto-quotes these values before they cause production surprises.

YAML is also a superset of JSON — every valid JSON document is valid YAML. Use the converters below to move freely between the two formats.