1. Drop
Click the SizeDrop icon in the menu bar. Drop JPEG, PNG, or HEIC files, or use Choose Images…
macOS · Menu bar
Compress images to a target size on your Mac
Drop a photo. Pick 500 KB, another file-size cap, or a longest edge. SizeDrop writes a smaller copy next to the original — locally, with no account.
Free to try. Unlimited use is a one-time unlock, not a subscription.
For the file that is just over the limit
Online compressors want an upload. Preview does not aim at a kilobyte cap. SizeDrop is the step before email, a form, or a post.
- Compress image to 500 KB
- Resize for email attachment
- Fit a photo to 2 MB
- Shrink HEIC before you send it
How it works
2. Pick the cap
Max file size aims at a target such as 200 KB or 500 KB. Max edge limits the longest side (default 1920 px).
3. Save a copy
Output is named *_sizedrop beside the original, or in Downloads if the source folder is not writable. Originals are never overwritten.
Why a Mac app
Target size, not “quality 60”
Forms and mailboxes state a number. SizeDrop aims at that number instead of making you guess a slider.
Stays on your Mac
No SizeDrop servers. Photos are not uploaded. There is no account and no analytics.
Pay once
20 free compressions, then a one-time unlock ($7.99 USD). Not a subscription. Restore Purchases is in Settings.
Common jobs
How do I compress an image to 500 KB on a Mac without uploading it?
Open SizeDrop from the menu bar, choose Max file size, set 500 KB, and drop the photo. You get a smaller JPEG (or PNG if transparency matters) next to the original.
Can I resize a photo for an email attachment?
Yes. Use Max file size for mailbox limits, or Max edge if the problem is pixel dimensions. SizeDrop writes a copy; the camera roll file stays put.
Does it convert HEIC?
HEIC is accepted as input. Output is JPEG unless the source needs a transparent PNG. SizeDrop is not a format-conversion suite.
Is this a subscription?
No. The Mac App Store listing is free to try. Unlimited use is a one-time In-App Purchase.