How to Compress a PDF for a Print Shop — Free
Print portals handle big files — but emailing them does not. Here is when to compress and when not to.
Real-world use — what we verified
We compressed a 40MB booklet to 9MB on High to email a FedEx store; for in-store printing we instead uploaded the original through their portal to keep full resolution.
Honest note: Compression rasterizes pages, which can soften small text. For professional printing, upload the original to the shop’s portal instead of emailing a compressed copy.
The limits you are up against
| Method | Limit | Safe target |
|---|---|---|
| Email to the shop | 25 MB (mail cap) | Under 18 MB |
| Shop upload portal | Often 100MB+ | Use original |
| In-store USB / portal | Varies | Use original |
Print shops’ own upload portals accept far larger files than email. Only compress when you must send by mail.
Step-by-step
- Decide how you will send it — portal or email.
- Emailing? Compress on “High” and keep under 18MB.
- Uploading to the portal? Send the original for best quality.
- Confirm the shop’s required page size and bleed before sending.
If it is still too big
- Use the shop’s upload portal instead of emailing.
- Split a large booklet into chapters.
- For email, compress harder or share a cloud link.
FAQ
Should I compress before printing?
Only if emailing the file (keep under 18MB). For portal uploads, send the original to preserve quality.
Will compressing hurt print quality?
It rasterizes pages and can soften small text, so avoid it for professional print unless you must email.
Staples / FedEx rejected my file?
Likely a size cap on email or a wrong page size. Upload via their portal or compress for mail.