HTTP headers
Content-Encoding HTTP Header Meaning
Content-Encoding says which encoding was applied to the body.
Meaning
The recipient must decode the body, such as gzip or br, before interpreting the media type.
Where it appears
Servers send it on compressed responses, often negotiated from Accept-Encoding.
What to check
Check that the body is actually encoded as declared and that Content-Type describes the decoded content.
Example
Content-Encoding: br