How to enable gzip for images in iis7?

Question

Hello.

I set dynamic compression and static compression on in iis7 manager. So html,css,js content is compressed ok and i see in headers Content-Encoding:gzip, but not with image formats: jpeg, gif and even bmp.

Answer 1

Generally speaking, you wouldn't want to. JPEG, GIF, and most (internet) image formats are already compressed. Compressing them a second time would add a lot of server overhead for very little size gain (and possibly a loss).