JSON to YAML Converter
Convert JSON to YAML and YAML back to JSON. Paste your data, pick a direction, and copy clean output — all in your browser.
JSON and YAML, side by side
JSON is the lingua franca of APIs; YAML is what config files, CI pipelines and Kubernetes manifests prefer because it's easier to read and supports comments. They describe the same data, so moving between them is a constant chore for developers. This converter does it instantly, in both directions, with validation built in.
How to use it
- Choose a direction — JSON → YAML or YAML → JSON.
- Paste your data on the left, or load the sample to see the shape.
- Copy the result on the right, or hit Swap to feed it back in.
Frequently asked questions
Does it work in both directions?
Yes. Switch the direction to convert JSON → YAML or YAML → JSON. Use the Swap button to flip the result straight back into the input for round-tripping.
What happens with invalid input?
If your JSON or YAML can't be parsed, the tool shows the parser's error message instead of producing broken output, so you can spot the line or syntax that needs fixing.
Are comments preserved?
No. YAML comments (lines starting with #) are dropped when converting to JSON, because JSON has no concept of comments. Anchors and references are also expanded into plain values.
Is my data sent to a server?
No. Conversion runs entirely in your browser using the js-yaml library, so your configuration files never leave your device.