How to Compress PDF to Send via Email — Under 10 MB, 5 MB, or 2 MB
Reduce PDF file size to fit email attachment limits. Multiple methods from basic compression to page removal.
Quick Reference: Target Sizes
| Email Provider | Limit | Safe Target |
|---|---|---|
| Gmail | 25 MB | Under 20 MB |
| Outlook | 20 MB | Under 15 MB |
| Corporate email | Often 10 MB | Under 8 MB |
| Very restrictive | 5 MB | Under 4 MB |
Method 1: Basic PDF Compression (5-30% reduction)
Re-serialize the PDF to remove unused objects and optimize structure. Quick, safe, no quality loss.
Method 2: Split Into Parts
Split a 30 MB PDF into three 10 MB parts. Send each in a separate email. The recipient can merge them back.
Method 3: Remove Unnecessary Pages
If the PDF has 50 pages but the recipient only needs 10, extract just those pages. A 50-page, 25 MB PDF might become a 5 MB, 10-page PDF.
Method 4: Reduce Image Quality
If the PDF contains high-resolution images (common in scanned documents), reducing their resolution can dramatically cut file size.
Method 5: Convert to Grayscale
Color images use 3x more data than grayscale. For text documents, converting embedded images to grayscale can reduce size significantly.
When All Else Fails
If the PDF is still too large after compression:
- Upload to Google Drive or OneDrive
- Share the link instead of the file
- Set appropriate viewing/download permissions
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