Using Fiddler to check IIS Compression

fiddler
Chris Burgess picture Chris Burgess · May 22, 2009 · Viewed 16.8k times · Source

How do I see if IIS Compression is working using Fiddler? I have a page that, when viewed through Port80Software or GID Network's tool it appears to be coming across compressed.

However, when I watch the call in Fiddler, I see the 'Accept-Encoding: gzip, deflate' in the request header, but I don't see the 'Content-Encoding: gzip' or 'deflate' in the response header. Also, in the Transformer section, 'No Compression' is selected.

Thanks!

Chris

Answer

andrew picture andrew · Jul 28, 2010

My version of fiddler has and AutoDecode button that made everything appear to have No Compression. After turning this off, my responses showed compression

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