What is this JSON ⇄ YAML converter?
A free, browser-based tool that converts JSON to YAML and YAML back to JSON. Paste your data, pick a direction, and the converted text appears instantly with copy and download buttons. Object key order is preserved in both directions, so diffs stay clean. JSON is everywhere for APIs and stored config; YAML is friendlier for hand-edited config files (CI pipelines, Kubernetes, Docker Compose). This tool moves data between the two without changing its structure. Everything runs locally in your browser, so your data is never uploaded.
How to use it
- Pick a direction: JSON → YAML or YAML → JSON.
- Paste your data into the box on the left.
- Read the converted output on the right. Invalid input shows a clear error message.
- For YAML → JSON, choose the JSON indentation (2 spaces, 4 spaces, or tab), then copy or download.
Common use cases
- Turning a JSON API response into a readable YAML config file.
- Converting a YAML CI / Kubernetes / Docker Compose file to JSON for tooling that expects JSON.
- Quickly sanity-checking that a config parses, and reformatting it consistently.