画像を指定した角度で回転したり、左右または上下に反転したりします。
Convert an image to JPG, PNG, WebP, GIF, BMP or TIFF.
Reduce image file size by re-encoding at a chosen quality.
Resize an image by width/height or percentage, keeping aspect ratio.
Crop an image to a rectangular region.
Add a text caption or watermark onto an image.
Overlay a second image (logo/watermark) onto a base image.