How do I compress a Json result from ASP.NET MVC with IIS 7.5
Use this guide
None of these answers worked for me. I did take note of the application/json; charset=utf-8 mime-type though.
Make sure your %WinDir%\System32\inetsrv\config\applicationHost.config contains these:
<system.webServer>
<urlCompression doDynamicCompression="true" />
<httpCompression>
<dynamicTypes>
<add mimeType="application/json" enabled="true" />
<add mimeType="application/json; charset=utf-8" enabled="true" />
</dynamicTypes>
</httpCompression>
</system.webServer>
From the link of @AtanasKorchev.
As @simon_weaver said in the comments, you might be editing the wrong file with a 32 bit editor on a 64 bit Windows, use notepad.exe to make sure this file is indeed modified.
I have successfully used the approach highlighted here.