JSON to YAML Converter

JSON Indent:YAML Indent:

JSON Input

YAML Output

Last updated: 2026 · Free online tool

What is JSON to YAML Converter?

Free online tool to convert between JSON and YAML bidirectionally

1
Select Direction — Choose JSON to YAML or YAML to JSON, or use auto-detection.
2
Enter Data — Paste the JSON or YAML data to convert into the left input panel.
3
Convert — Click the 'Convert' button to display the result on the right.
4
Copy Result — Use the copy button to copy the result. You can also use the swap button for reverse conversion.

Yes, if the input starts with { or [, it is detected as JSON; otherwise it is detected as YAML. You can also manually specify the direction.

Yes, since js-yaml library is used, basic anchors/aliases are supported. However, references are resolved in the output.

Currently only single YAML documents are supported. For multi-document YAML, only the first document is converted.

JSON has no comment concept, and YAML comments are removed during parsing. Keep a backup of the original if comments need to be preserved.

Date formats in YAML (2026-01-01) are parsed as Date objects by js-yaml. They are output as ISO 8601 strings in JSON.