It is easier for humans to read and edit than JSON, especially for configs.

Is the conversion lossless?

For plain data yes; comments and custom tags are not added.

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JSON to YAML

Convert JSON into clean, indented YAML. Local, free, no signup.

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JSON

YAML

Why use YAML?: It is easier for humans to read and edit than JSON, especially for configs.
Is the conversion lossless?: For plain data yes; comments and custom tags are not added.