How to Email Large PDF Files (Over 25 MB)
Compress, split, or restructure PDFs when email providers reject oversized attachments.
Published May 15, 2025 · 1 min read
Most email providers limit attachments to 10–25 MB. When your quarterly report or scanned dossier exceeds that, you have three practical options — not all are equal.
Option 1: Compress the PDF
Start with medium compression. Image-heavy scans often shrink 50–70% with readable text. RatPDF uses Ghostscript — the same engine behind many print shops.
Option 2: Split into parts
If compression is not enough, split by chapter or date range and send numbered parts (Part 1 of 3) in separate emails.
Option 3: Cloud links
Drive and Dropbox work, but corporate recipients often block external links. PDF compression keeps everything inside email workflow.
Checklist before hitting send
- Open the compressed PDF on your phone — text still readable?
- File name descriptive:
Acme_Q3_Report_compressed.pdf - Password-protect if the content is confidential
Sources & references
Primary references used when researching and fact-checking this guide. See our editorial methodology.
-
Adobe PDF Reference — encryption
— Adobe
PDF password protection and encryption standards (ISO 32000). -
Ghostscript documentation — PDF settings
— Artifex Software
Compression level behavior and PDF output settings.