Compress image for Apple Mail (iCloud / Mail Drop)
Apple Mail supports 20 MB direct attachments and 5 GB via Mail Drop.
Your images stay on your device. Nothing is uploaded.
Apple Mail routes attachments two ways: direct SMTP up to 20 MB, or Mail Drop (which uploads to iCloud and sends a link) up to 5 GB. For direct-attach delivery — which most recipients prefer — land your photo under 5 MB.
This preset targets 2.5 MB per image — safely direct-attachable to any modern email client.
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Frequently asked questions
- What's the attachment size limit for Apple Mail?
- Apple Mail caps attachments at the size the preset on this page targets. Anything above the cap either gets rejected or gets converted to a link-share fallback (like Gmail's Drive attachment).
- Why compress before attaching to Apple Mail?
- Recipients may be on slow mobile connections, and their servers may enforce lower caps than yours. Compressing before send maximises deliverability and speeds up download for recipients on mobile.
- Does Apple Mail compress images automatically?
- Apple Mail does not re-compress attachments the same way social media platforms do — what you send is what the recipient receives. So the size at send equals the size at receive.
- What format is best for Apple Mail?
- JPEG is the safest universal choice for email attachments — every email client can preview it inline. WebP support varies (Outlook desktop can't preview WebP), so JPEG remains the default.
- Is my image uploaded to a server?
- No. Compression runs entirely in your browser. Only when you attach the compressed result to your email does it leave your device.
Compress an image for Apple Mail.
Land under the target size in seconds. Nothing uploaded — runs entirely in your browser.
Start compressing