Create a spritesheet from png file

Hi,
Is it any automatic way to create a spritesheet from png files?
My designer prepared all animations in separate png files.

It’s for 2d project (I don’t know if it a nessesary info) aand I work under windows

Thanks,

TexturePacker is free and can create spritesheets from a folder of multiple image files.

Spritesheetpacker is another option, and is open source.

If you have Unity Pro, then assign packing tags to the appropriate texture files and they will be packed automatically.