Free Online JSON to YAML Converter
YAML is the configuration language of modern infrastructure. Kubernetes, Docker Compose, GitHub Actions, and Ansible all use YAML. Our free converter transforms JSON into clean YAML for DevOps workflows — paste your JSON directly or upload a .json file to get started instantly.
How the Converter Works
Paste valid JSON or upload a .json file. The js-yaml library serializes it to YAML with your chosen indentation (2-space or 4-space) and proper string quoting where needed for values like no or strings containing colons.
Frequently Asked Questions
Is YAML a superset of JSON?
Every valid JSON document is valid YAML. YAML adds comments, anchors, and multi-line strings.
Can I upload a JSON file instead of pasting?
Yes. Click the "Upload .json" button to load a file directly from your device. The file contents will populate the input field automatically.
What indentation options are available?
You can choose between 2-space indentation (standard for Kubernetes, Docker, and GitHub Actions) or 4-space indentation for improved readability in deeply nested configs.
Does this preserve comments?
Standard JSON has no comments. Add YAML comments manually after conversion.