How to Reduce PDF Size for Email
Email services limit attachment sizes. Here is how to make your PDFs fit.
Email Attachment Limits
| Email Provider | Max Attachment Size |
|---|---|
| Gmail | 25MB |
| Outlook.com | 20MB (34MB with OneDrive) |
| Yahoo Mail | 25MB |
| ProtonMail | 25MB |
| iCloud Mail | 20MB |
| Office 365 | 10-25MB (varies by plan) |
How to Compress a PDF for Email
1. Open our Compress PDF tool
2. Upload your PDF (drag and drop)
3. Choose compression level:
- High: 50-80% reduction (best for email)
- Medium: 30-50% reduction
- Low: 10-30% reduction (best quality)
4. Download your compressed PDF
Expected Results
| Original Size | After Compression (High) | After Compression (Medium) |
|---|---|---|
| 50MB | 10-15MB ✅ | 20-30MB ✅ |
| 25MB | 5-8MB ✅ | 12-18MB ✅ |
| 10MB | 2-4MB ✅ | 5-7MB ✅ |
| 5MB | 1-2MB ✅ | 2.5-3.5MB ✅ |
Alternative: Split the PDF
If compression isn't enough, split your PDF into smaller parts:
1. Use our Split PDF tool
2. Extract specific pages or ranges
3. Send each part in separate emails
Other Size Reduction Tips
- Convert to images: Use PDF to JPG for individual page images (often smaller)
- Remove images: If the PDF has large photos, recreating it without images drastically reduces size
- Print to PDF: Sometimes "printing" a PDF to a new PDF reduces size (re-encodes images)
- ZIP compression: Compress the PDF in a ZIP file before attaching (helpful for multiple PDFs)
Compress your PDFs for free at ImageToolbox PDF Compressor. No uploads, no signup, 100% private.
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