Apple Mail has a 20–25MB attachment limit. For larger files, Mail Drop automatically uploads to iCloud and sends a link. Compress yours here if you need a direct attachment.
🔒 Files never leave your device⚡ Instant processing in browser💸 100% free — no signup
📄
Drop your PDF here to fix upload errors
or click to select file — PDF only
Target size (optional)
targeting 20 MB
⚡ Apple Mail File Size Limits (Quick Fix)
•Mail Drop allows sending files up to 5GB and stores them in iCloud for 30 days before the link expires.
•Base64 encoding adds approximately 33% overhead to email attachments in transit — a 20MB file becomes ~27MB on the wire.
👉 Fix: Compress your file below 20 MB using the tool above.
About this tool
Mail Drop is enabled by default in Apple Mail and handles files up to 5GB via iCloud. For recipients on other email platforms, keeping attachments under 20MB ensures delivery regardless of their provider.
How to use this tool
Select or drag and drop your file into the tool above.
Adjust the settings or target size as needed for your specific requirement.
Wait a moment while your file is processed directly in your browser.
Download the final file safely to your device.
💡 Good to know
→Apple Mail supports Mail Drop, which automatically uploads attachments over the size limit to iCloud and sends the recipient a download link.Apple Support ↗
→Mail Drop allows sending files up to 5GB and stores them in iCloud for 30 days before the link expires.Apple Support ↗
→Mail Drop can be enabled in Apple Mail under Settings > Accounts > Account Information.Apple Support ↗
→Even if Apple Mail sends a large file via Mail Drop, the recipient's email provider may reject it if their inbox has a smaller storage limit.
→Base64 encoding adds approximately 33% overhead to email attachments in transit — a 20MB file becomes ~27MB on the wire.
Apple Mail has a standard limit of 20–25MB per message. For larger files, Mail Drop automatically uploads the file to iCloud and sends a download link instead.Source: Apple Support ↗
What is Mail Drop in Apple Mail?+
Mail Drop is an Apple feature that automatically handles attachments too large to send directly. It uploads the file to iCloud and sends the recipient a link. Files are stored for 30 days and can be up to 5GB.Source: Apple Support ↗
Do I need to do anything to enable Mail Drop?+
Mail Drop is available in Apple Mail settings under Accounts > Account Information. Once enabled, it activates automatically when an attachment exceeds the size limit.Source: Apple Support ↗
Will a Mail Drop link work for recipients on Gmail or Outlook?+
Yes. Mail Drop sends a standard download link that any email recipient can open in any browser, regardless of their email provider.Source: Apple Support ↗
When should I compress instead of using Mail Drop?+
Compress when the recipient needs a direct attachment (e.g. for a job application portal or form submission), or when you need the file to arrive as an attachment rather than a link.Source: Apple Support ↗
🔒 Files stay on device·🆓 Free forever·📵 No signup required