March 25, 20263 min read

How to Compress Files for Email — Beat the 25 MB Limit

Reduce file sizes to fit email attachment limits. Compress PDFs, images, videos, and ZIP archives to send via Gmail, Outlook, and other email services.

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The Universal Email Problem

Gmail: 25 MB attachment limit. Outlook: 20 MB. Yahoo Mail: 25 MB. Most corporate email servers: 10-25 MB.

Meanwhile, a single iPhone photo is 3-8 MB. A 10-page scanned PDF is 15-30 MB. A 30-second video is 60-200 MB. The math doesn't work.

Here's how to make files fit.

By File Type

PDFs

Scanned PDFs are the worst offenders — each page is essentially a large image.

Method	Typical Reduction	Quality Loss
MyPDF Compress PDF	60-80%	Minimal
Remove unnecessary pages (Split PDF)	Proportional	None
Grayscale conversion (Grayscale PDF)	30-50%	Color removed

A 45 MB scanned document typically compresses to 8-12 MB — well within email limits.

Images

Method	Before	After
Resize (4000px → 1600px)	5 MB	800 KB
Convert JPG → WebP	800 KB	550 KB
Compress (quality 80)	550 KB	350 KB

MyPDF Compress Image handles all three in one step.

For multiple images, ZIP them first (reduces total overhead), or combine into a PDF: MyPDF JPG to PDF.

Videos

Videos almost never fit in email. A 1-minute 1080p video is 100-200 MB.

Options:

Compress aggressively: MyPDF Compress Video — aim for "email" quality preset

Trim to essentials: Cut out everything except the key moment

Use a sharing link instead: Upload to Google Drive, Dropbox, or WeTransfer and share the link

For videos over 25 MB (most of them), cloud links are the practical answer.

Multiple Files

ZIP compression helps for documents and images:

10 Word documents: ZIP saves 40-60%

20 JPG photos: ZIP saves only 2-5% (JPGs are already compressed)

Mixed files: varies

MyPDF Create ZIP bundles files into a single archive. The recipient gets one download instead of 15 separate attachments.

The Cloud Link Alternative

When compression isn't enough:

Service	Free Upload Limit	Link Expiry	Password Protection
Google Drive	15 GB	Never	Yes
WeTransfer	2 GB	7 days	Paid only
Dropbox	2 GB	Never	Yes
OneDrive	5 GB	Never	Yes

Upload the file, generate a sharing link, paste the link in your email. The recipient clicks the link to download. This bypasses email attachment limits entirely.

Quick Decision Guide

File Size	Action
Under 10 MB	Attach directly — no compression needed
10-25 MB	Compress and attach
25-100 MB	Compress aggressively OR use cloud link
Over 100 MB	Cloud link (compression alone won't help enough)

Compress PDF — Shrink PDFs for email
Compress Image — Reduce image file sizes
Compress Video — Video compression
Create ZIP — Bundle multiple files