You can analyse them right here on this site. You can even analyse OTB games in the explorer, just paste your pgn.
But if you want to do It offline, then you have to download the engines (Komodo is not exactly free), as well as a chess app. I hear Lucas Chess is a good program to plug your engines in.
In my opinion @Viktortoli, all that stuff can get pretty complicated for no good reason. Just analyse the games you've played here on chess.com with the sites own analysis tool. To do so, open your game (which you can always find in your archive) and click on the icon with a small laptop and magnifying glass. This will take you straight to game analysis.
Get some practice with that, and soon enough you'll be ready to experiment with all types of different tools.
If you're still having problems then just post a picture showing us how far you've gone.
Hi guys, just wondering how can i use one of these to analyse my games
Do i have to download one of them ? If so, how may i transfer my games in the engine afterwards ?
Thank you