YAML ↔ JSON Converter
Convert between YAML and JSON instantly in your browser — bidirectional, no upload.
100% in your browser
No watermark
No sign-up
How it works
- Choose a direction: YAML → JSON or JSON → YAML.
- Paste or type your input — the result appears instantly as you type.
- Copy the output to your clipboard or download it as a file.
Frequently asked questions
- What YAML features are supported?
- The converter uses js-yaml, which supports the full YAML 1.2 spec including multi-line strings, anchors, aliases, and nested structures.
- Are my files uploaded anywhere?
- No. All conversion happens locally in your browser using js-yaml. Nothing is sent to any server.
- What happens if my YAML or JSON is invalid?
- The parser error message is shown in red below the input so you can quickly spot and fix the problem.
- Does the YAML output preserve key order?
- Yes — js-yaml.dump() outputs keys in the same order they appeared in the source JSON object.