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Email Attachment Size Limits: Gmail, Outlook, Yahoo and iCloud
Know the limit, then shrink the photos instead of fighting your inbox.
Attachment limits by provider
Gmail: 25 MB per message. Above that, Gmail offers to insert a Google Drive link instead of attaching the file.
Outlook.com: about 20 MB per message for regular attachments, with larger files shared through OneDrive links.
Yahoo Mail: 25 MB per message.
iCloud Mail: 20 MB per message directly, with Mail Drop handling much larger files by turning them into a download link.
These limits change from time to time, so treat them as a guide and check your provider's help page if you are close to the line. Also remember that email encoding adds overhead: a 20 MB file can count as noticeably more than 20 MB once it is attached.
What to do when you hit the limit
Shrink the photos. This is usually the fastest fix. Phone photos are often 3–8 MB each, far more than an email needs. The image compressor lets you lower quality or pixel dimensions, and you can process up to 10 photos at once and download them as one ZIP. Everything runs in your browser, so nothing is uploaded anywhere.
Bundle photos into one PDF. If you are sending several pictures, the PDF tools can combine them into a single document with the pages in the order you chose.
Share a cloud link instead. Upload to Google Drive, OneDrive or iCloud and paste the link. The catch: the recipient has to click through, and some company mail systems flag or block external links, in which case a direct attachment is more reliable.
Work and school accounts can be stricter
The numbers above apply to personal accounts. Google Workspace and Microsoft 365 administrators can set lower limits for their organization. If a photo that sends fine from your personal address bounces from your work account, the cause is probably an admin policy rather than the email service itself.
FAQ
Will Gmail refuse to send a file over 25 MB?
No. It converts oversized attachments into a Google Drive link, and the message still goes out. The recipient just has to download the file from Drive.
Does zipping photos make them much smaller?
Not really. JPG and similar formats are already compressed, so a ZIP saves very little. Lowering the photo's quality or dimensions is far more effective.
Will compressing photos ruin their quality?
It depends on the quality setting. For on-screen viewing, a moderate setting is usually indistinguishable from the original. See the measured results in our format comparison.
Can the recipient fail to open a cloud link?
Yes. Corporate mail filters sometimes block or quarantine external links. If delivery matters, attach the file directly.