Had a request that needs to analysis IIS log, search a little bit and found out this tool: Log Parser Studio, and it’s build on top of the command tool Log Parser 2.2, it will load your formatted log file, which you can use SQL-like query to grab information base on your requests, very powerful tool for Windows platform.
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For installation, you will need to install Log Parser 2.2 then download the Log Parser Studio zip file and run the LPS.exe from where you extracted it.