How to Reduce PDF Size for Email: Quick Methods

Email attachment too large? Here's how to shrink your PDF quickly.

Email Attachment Limits

Common limits you'll encounter:

Quick Compression Method

Step-by-Step:

1. Go to lexosign.com/compress-pdf
2. Upload your PDF
3. Select compression level:
4. Light - Minimal reduction, best quality
5. Medium - Good balance (recommended)
6. Strong - Maximum reduction, some quality loss
7. Download compressed file
8. Verify it's under your limit

Typical results:
- 20 MB → 2-5 MB (medium compression)
- Images compress most; text stays sharp

Understanding What Makes PDFs Large

Images

The biggest factor:
- High-resolution photos
- Embedded screenshots
- Scanned pages (essentially images)
- Multiple images per page

Embedded Fonts

Each font adds size:
- Multiple font families
- Full font sets vs. subsets
- Decorative fonts

Document Complexity

Other factors:
- Layers and annotations
- Form fields
- Multimedia content
- Revision history

Compression Levels Explained

Light Compression

Best for:
- Documents going to print
- Image-heavy PDFs where quality matters
- Professional presentations

Expected: 20-40% size reduction

Medium Compression (Recommended)

Best for:
- Most email attachments
- Screen viewing
- General sharing

Expected: 50-70% size reduction

Strong Compression

Best for:
- Very tight size limits
- Archival copies rarely accessed
- Text-heavy documents

Expected: 70-90% size reduction
Caution: Images may look pixelated

Alternative Methods

Method 2: Reduce Image Quality Before Creating PDF

In source application:
- Resize images before inserting
- Use "compress pictures" feature
- Export at screen resolution, not print

Method 3: Remove Unnecessary Pages

Before compressing:
- Remove blank or duplicate pages
- Extract only needed pages
- Delete cover pages or appendices

Method 4: Split the Document

If compression isn't enough:
- Split PDF into parts
- Send multiple emails
- Or use cloud storage instead

Method 5: Use Cloud Storage

Alternative to email attachment:
1. Upload to Google Drive, Dropbox, OneDrive
2. Share link instead of file
3. No size limits

Quick Tips by PDF Type

Scanned Documents

• Scan at 150 DPI (not 300+) for email
• Use black and white for text documents
• Strong compression usually acceptable

Presentations

• Export at "email" or "screen" quality
• Remove unused slides
• Compress before exporting

Photos/Images

• Resize images before adding to PDF
• Medium compression preserves most detail
• Consider linking to high-res versions instead

Text Documents

• Usually small already
• Light compression sufficient
• Font subsetting helps

Checking File Size

Before Sending

Windows:
- Right-click file > Properties

Mac:
- Select file > Cmd+I

Online:
- Most compressors show before/after size

Target Sizes

What If Compression Isn't Enough?

Options:

1. Split the document - Send in parts
2. Use cloud storage - Share link instead
3. Remove content - Delete unnecessary pages
4. Rescan at lower quality - If from scanner
5. Recreate with smaller images - If you have source files

Quality Check

After compressing, verify:
- Text is still readable
- Important images are clear enough
- All pages are present
- File opens correctly

Avoiding the Problem

Prevention Tips

When creating PDFs:
- Use appropriate image resolution
- Compress images in source documents
- Choose "minimum size" export options
- Don't embed unnecessary fonts

Regular Documents

If you frequently share PDFs:
- Establish size guidelines
- Create email-ready templates
- Use consistent compression workflow

Conclusion

For most PDFs, online compression with medium settings works great:

1. Upload your PDF
2. Select medium compression
3. Download and check size
4. Adjust if needed

If still too large, consider cloud storage links instead of attachments.

Pro tip: Compress before sending, not after being told it's too large. Check your recipient's likely limits beforehand.