new to this

[Masquerade]

Originally Posted by Crimzan

Also how do you know it's compressed with zlib? Are you an experienced file magician and / or do you know of a scanner software that can test if a file is compressed, and what it is compressed with?

Razor made drop + scan 4 zlib which is sometimes useful.

There's also this Zenhax page where Aluigi explains how to recognise different algorithms by their headers or magic numbers: https://zenhax.com/viewtopic.php?t=27

This requires a hex editor to view the data. I like HxD.