How to Compress PDF for Email Attachments
Compress PDF files for email attachments. Reduce file size to fit under Gmail, Outlook, and Yahoo email limits — free and instant.
Need to compress a PDF for email but it is too large to attach? Email providers enforce strict file size limits: Gmail caps at 25 MB, Outlook at 20 MB, and Yahoo at 25 MB. PDF Shuttle's compressor shrinks files to fit comfortably within these limits.
Email Attachment Limits
| Provider | Attachment Limit | |----------|-----------------| | Gmail | 25 MB | | Outlook | 20 MB | | Yahoo Mail | 25 MB | | Apple Mail | 20 MB | | ProtonMail | 25 MB |
If your PDF exceeds these limits, the email will bounce or the provider will convert it to a download link — which looks unprofessional.
How to Compress a PDF for Email
Step 1: Go to Compress PDF on PDF Shuttle. Step 2: Upload your oversized PDF. Step 3: Choose Medium compression for the best balance of size and quality. Step 4: Download and attach to your email.
Most PDFs compress by 40–90%, which is usually enough to get under any email limit.
What If It Is Still Too Large?
If compression alone is not enough:
- Remove unnecessary pages with Delete PDF Pages before compressing.
- Split the document into parts with Split PDF and send as multiple attachments.
- Use Aggressive compression for maximum size reduction, accepting minor quality loss in images.
Common Scenarios
- Job applications: Portfolio PDFs with high-res images. Compress with Medium to keep quality while fitting under 20 MB.
- Financial reports: Image-heavy annual reports often hit 50 MB+. Aggressive compression can bring them under 10 MB.
- Scanned documents: Scanned pages are notoriously large. Compression typically reduces them by 60–80%.
Privacy
The compressor runs entirely in your browser. Your email attachments — whether they contain financial data, legal documents, or personal information — never leave your device.