tips5 min
Best PDF Size for Email Attachments
M
By Michelle Taylor
Quick Answer
FreeConversion compresses your PDFs up to 90% of their original size while preserving visual quality, using 100% local processing via WebAssembly. No uploads, no file limits.
%
Reduces PDF size by an average of 78%%
Processing in less than 5 seconds for a 10MB file%
100% of files stay on your device%
Compatible with 99% of PDF readers“Learn the ideal PDF file size for email attachments.”
Here's everything about PDF sizes for email.
Attachment Limits
Most services allow up to 25MB. But smaller is better.
Recommended Sizes
- Under 5MB — Ideal. Downloads quickly
- 5-10MB — Acceptable for most recipients
- 10-20MB — Only when necessary
- Over 20MB — Consider compression or cloud sharing
Why Smaller Is Better
- Saves recipient's mailbox space
- Faster downloads, especially on mobile
- Shows professionalism
- Many corporate emails limit to 10MB
Quick Solution
Upload to FreeConversion, select High compression, download. Most documents will be well under 5MB.
Alternative: Cloud Links
For very large files, upload to Google Drive, Dropbox, or OneDrive and share a link instead. This also allows you to update the file later without resending.