拡張子変換（JPEG - PNG）

It's very simple to use, and here's an overview of each function and how to use it.

★ Extension conversion
・Multiple images can be loaded at once.
・The extension of the conversion destination is JPEG or PNG.
・How to use is just to save after reading the image and selecting the extension of the conversion destination.

★ rotation
・You can change the rotation angle of the image.
- All you have to do is load an image, rotate it, and save it.

★ Flip
・You can set image reversal.
- All you have to do is load an image, flip it (horizontally or vertically), and save it.