https://silent-tower-games.itch.io/sprite-sheet-exporter

Split Your Sprite Sheets Into Individual Files

Some game engines prefer your sprites to be split into individual files. Sometimes, you prefer to work with them that way yourself. Whatever your reason might be, this command line-based tool will automate all of that for you.

It might look a little scary at first, but if you give it a shot, it should do the trick for your every time.

Got a suggested feature you want it to have? Leave a comment!

Perks:

• Extremely small file size -- 10KB executable!
• Open-source!
• Fast!
• Automates tedious work!