JSON ↔ YAML Converter
Convert between JSON and YAML with live preview and validation
Your files never leave your browser. Nothing is uploaded to any server. Privacy Policy
Convert JSON to YAML or YAML to JSON with live, side-by-side preview. Useful for editing Kubernetes manifests, GitHub Actions workflows, OpenAPI specs and any config that uses both formats. Errors are highlighted with line numbers for easy debugging.
How to convert JSON and YAML
1
Pick direction
Choose JSON → YAML or YAML → JSON.
2
Paste source
Paste the input — output appears live as you type.
3
Copy or download
Use the buttons to copy or save the converted file.
Both directions
Convert JSON → YAML or YAML → JSON with a single toggle.
Live validation
Errors are reported with line numbers as you type.
Copy and download
One-click copy or download as .json or .yaml file.
100% local
Conversion runs in your browser using js-yaml — nothing is uploaded.
FAQ
YAML is more readable for humans (no quotes around keys, comments allowed) and is the standard for many DevOps tools — Kubernetes, Docker Compose, GitHub Actions, Ansible.
Yes. YAML 1.2 is a superset of JSON — every JSON document is valid YAML.
Common issues: tabs (use spaces only), missing colons after keys, inconsistent indentation. Errors include the line number.
JSON has no comments, so YAML → JSON drops them. JSON → YAML output has no comments either.
No. Conversion uses js-yaml in your browser — nothing leaves your device.