How to Reduce PDF File Size for Email Attachments

Email Attachment Size Limits (Gmail, Outlook, Yahoo)

Most major email providers enforce strict maximum attachment limits:

• Gmail: 25 MB total message limit
• Outlook / Office 365: 20 MB – 25 MB limit
• Yahoo Mail: 25 MB limit

When sending to corporate inboxes with strict IT security firewalls, incoming attachments exceeding 10 MB are frequently rejected or sent to spam folders.

How to Compress PDF for Email Delivery

To guarantee smooth delivery, reduce your document size to under 5 MB using our free in-browser PDF Compressor. By stripping redundant document metadata and optimizing heavy scanned images, you can achieve 50% to 80% file size reductions while keeping text perfectly readable.