Compress PDF for Email Attachments
Fit your PDF within email attachment limits so it actually reaches the recipient.
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How to Compress PDF for Email Attachments
- 1
Drop in your PDF
Add the PDF that's too large for your email. The tool handles files up to 100MB.
- 2
Compress for email
Medium compression works well for email — it balances file size with readability.
- 3
Attach and send
Download the compressed PDF and attach it to your email. Aim for under 10MB to avoid slow sending.
Email Attachment Limits by Provider
Gmail caps attachments at 25MB total (not per file — total across all attachments). Outlook limits you to 20MB. Yahoo Mail allows 25MB. If you're attaching three PDFs, they all need to fit within that single limit combined.
Corporate email systems are often stricter. Many Exchange servers cap at 10MB, and some older systems still enforce 5MB limits. Your file might send fine from your side but bounce back because the recipient's server rejects it.
Beyond hard limits, large attachments are just annoying. A 15MB PDF takes noticeably longer to download on mobile. Compressing to 2-5MB makes you the kind of person people don't dread getting email from.
Frequently Asked Questions
What size should I target for email attachments?
Under 5MB is ideal. Under 10MB is acceptable. Over 10MB and you should consider a file sharing link instead, but compression usually gets you there.
My email bounced back saying the file is too large. What happened?
The recipient's mail server likely has a lower limit than yours. Compress the PDF further or use a cloud storage link (Google Drive, Dropbox) instead of a direct attachment.
Does compression affect the PDF if the recipient prints it?
Medium compression reduces image resolution to about 150 DPI. For standard office printing, that's perfectly fine. For professional photo printing, use low compression instead.