Can i somehow generate mate in x puzzles from games?

Hi there! I really want a software like this.
You input your games in PGN
Then it will search automaticaly for mate in X. I missed so many mates in my own games, i want to practice it.
But i can not find any of these tools, only looking on lichess manually for mates after computer analysis.

How they generate the big mate puzzles online? I want the same software. Unfortunately i am stupid to programming.

Thats pretty interesting, i wish i had learned to program

Now i found the game analyse options in Arena Chess, but i can't know how to process the output analysis file. It says if the game has Mate in 3-4 for example.

You can't post in the forums yet. Play some games!