JSON to YAML converter

Convert JSON and YAML with type checks.

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JSON to YAML converter processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Updated 2026-09-20

JSON to YAML converter explained

Convert JSON values to YAML 1.2 or YAML back to JSON. Mapping keys must be unique; unsupported tags, non-finite numbers and unsafe integers are rejected instead of silently changing values.

Next: JSON TOML converter

Next: JSON to TypeScript

A worked example

The JSON value {"active":true} becomes active: true in YAML. The string "008" remains a quoted string so it does not become a number.

Before you use the result

YAML uses the bundled yaml 2.9.1 parser with bounded aliases. JSON output uses string keys and JavaScript decimal precision. Comments and YAML anchors are presentation features and are not preserved through JSON.

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ToolOctopus. “JSON to YAML converter.” Updated 2026-09-20. https://tooloctopus.com/json-to-yaml-converter.

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