YAML ↔ JSON Converter
Convert between YAML and JSON formats with validation and pretty-printing.
YAML Input
JSON Output
JSON output will appear here
YAML and JSON Converter
Paste YAML to convert it to formatted JSON, or paste JSON to convert it to clean YAML. The tool validates input and reports parse errors immediately. Powered by the js-yaml library running in your browser — no data is sent anywhere. Supports all standard YAML 1.2 syntax including anchors, multi-line strings, and nested structures.
Frequently Asked Questions
- What YAML features are supported?
- The converter supports all standard YAML 1.2 features including anchors and aliases, multi-line strings, nested objects and arrays, null values, booleans, and numbers. It uses the js-yaml library.
- What happens if my YAML or JSON is invalid?
- The tool shows an error message describing what went wrong, including the location in the input where the parse error occurred.
- Is my data safe?
- Yes. All conversion happens locally in your browser using the js-yaml JavaScript library. No data is ever sent to a server.
- Will comments in YAML be preserved?
- No. YAML comments are not part of the data model, so they are lost during the YAML → JSON → YAML round-trip. This is a fundamental YAML specification limitation.
- Can I convert Kubernetes or Docker Compose files?
- Yes. These are standard YAML files and are fully supported. The tool will correctly parse all YAML types used in Kubernetes manifests and Docker Compose files.