mSIZER

mSIZER processes a batch of photos in one pass. Drop photos or folders on the window, pick what to change, and the selected photo shows a live before and after preview.

Operations you can combine:

• resizing by long side, width, height or percentage, or to fit or fill a box, never enlarging;
• cropping to a ratio with an anchor, or by hand with handles on the preview;
• rotating, flipping and auto enhance, brightness, contrast, saturation and sharpness;
• text or logo watermarks in nine positions;
• renaming with a pattern such as {name}, {n} or {date}.

Output can be JPEG, PNG, WebP, HEIC, AVIF, TIFF, PSD, PDF and several more, with a quality slider or a maximum file size the app reaches by adjusting quality. Metadata can be kept, stripped of GPS location only, or erased. Presets cover the web, email and social networks such as Instagram, YouTube or Discord.

Results go to a subfolder or another folder. If you choose to replace originals, they go to the Trash, and existing files are never overwritten. Filters run on the GPU through Core Image.

The app is modeled on Photo Bulk Editor and not affiliated with it. It runs on Apple silicon only, needs macOS 15 or later, and is notarized.