JSON ↔ YAML Converter

JSON ↔ YAML, both directions. Validated, formatted, copy and go.

Stays on your device. This tool runs in your browser — nothing you paste or open ever leaves it. Nothing uploaded, nothing to leak.

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How to use it

Choose JSON → YAML or YAML → JSON, paste your data, and press Convert (or Cmd/Ctrl+Enter). The output is formatted and ready to copy. If the input is not valid JSON or YAML, the error explains what went wrong.

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A JSON-to-YAML converter transforms data between the two formats — JSON (used by APIs) and YAML (used by config files like Docker Compose, Kubernetes and CI pipelines). Pick a direction, paste your data, and get clean, formatted output. Invalid input is flagged. It runs in your browser.

JSON vs YAML

JSON is compact and universal for APIs; YAML is easier to read and edit by hand, which is why it dominates config files. Converting between them lets you move data from an API response into a config, or turn a config into JSON for a program to read.

FAQ

Does it work both ways?Yes — JSON to YAML and YAML to JSON, chosen from the dropdown.

Does it validate my input?Yes — invalid JSON or YAML is caught and the error is shown, so you can fix it.

Is my data uploaded?No — the conversion happens entirely in your browser.