Converting .txt to bin.lz Issue

It seems that when you said that .txt could be converted back into bin.lz, it didn't seem to work for me. I could probably be just putting words in your mouth, but whenever I try to convert it, it does nothing.

[AyraHikari]

Same to me in .txt file from Fire Emblem Heroes
I think there is no code for converted back into bin.lz