Free YAML to JSON Converter — Convert Between YAML and JSON Online

Our free YAML to JSON converter instantly converts YAML to JSON and JSON to YAML with live syntax validation. All conversion happens in your browser. Essential for DevOps engineers working with Kubernetes, Docker Compose, GitHub Actions, Ansible and Terraform — all of which use YAML — while most APIs and SDKs use JSON.

YAML vs JSON

• YAML — human-readable, supports comments, less punctuation. Used by Kubernetes, Docker Compose, GitHub Actions, Ansible, CircleCI.
• JSON — strict syntax, universally supported by APIs and languages. Used by REST APIs, package.json, tsconfig, most web services.

Common YAML Pitfalls

• Tabs vs spaces — YAML requires spaces only. Tabs cause parse errors.
• Boolean gotcha — yes/no/on/off are booleans in YAML 1.1. Quote them if you want literal strings.
• Special characters — colons and hashes in values must be quoted.
• Multiline strings — use | to preserve newlines, > to fold them.