Photo Batch Resize is a native Mac app for shrinking many photos to the same rules in one step — max longest edge, max width, max height, or fit inside a box
Photo Batch Resize is a native Mac app for shrinking many photos to the same rules in one step — max longest edge, max width, max height, or fit inside a box.
Perfect before email, websites, client uploads, or social posts when your camera files are too large.
How it works
• Add photos — Drop images into the library or use Add Photos. Files stay in their original location on your Mac.
• See dimensions — The sidebar summarizes width and height across your library (min, max, average) so you know what you’re working with.
• Set resize rules — Choose a mode and limit (e.g. longest edge 2048 px). The app shows how many photos will resize vs already fit.
• Export — Pick a folder and click Generate. Resized copies are saved with a _resized suffix. Originals are never modified.
Resize modes
• Longest edge — Scale down if the longest side exceeds your limit (keeps aspect ratio)
• Max width — Cap horizontal size
• Max height — Cap vertical size
• Fit inside box — Scale down to fit within max width × height
Photos are never upscaled unless you choose otherwise in a future update.
Why Photo Batch Resize
• Built for batches — One setting, whole folder.
• Summary first — See dimensions and impact before exporting.
• Safe export — Non-destructive copies to your chosen folder.
• Native Mac app — SwiftUI, sandboxed, offline, no account.
• Photo workflow — Pairs with Photo Batch Watermark, Photo Contact Sheet, and Photo PDF Builder in The Beaver Tools suite.
Good for
• Shrinking RAW/DSLR exports for web or email
• Standardizing a shoot to one max dimension
• Reducing file size before upload
• Batch prep after import from camera or phone
Privacy
Photo Batch Resize works fully offline. Images are read only from files you select and written only where you choose. No cloud, no analytics, no account, no network access.
Requirements
macOS 14.0 or later.
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Part of The Beaver Tools — a collection of focused Mac utilities.