Email Attachment Size Limits
Every email provider has attachment size limits that can block your PDFs:
- Gmail: 25 MB
- Outlook: 20 MB
- Yahoo Mail: 25 MB
- Apple Mail (iCloud): 20 MB
- Many corporate email servers: 5-10 MB
If your PDF exceeds these limits, you need to compress it. The good news: most PDFs can be reduced by 50-80% without noticeable quality loss.
Compress PDF for Free
ToolHaven's PDF Compressor reduces file sizes right in your browser:
- Step 1: Upload your PDF file
- Step 2: Choose compression level (low, medium, high)
- Step 3: Download the compressed version
Your PDF never leaves your device — it's processed locally using JavaScript. This makes it safe for contracts, medical records, financial documents, and any sensitive content.
Why PDFs Get So Large
- Embedded images: High-resolution photos are the #1 cause of large PDFs
- Embedded fonts: Full font families add significant size
- Scanned documents: Scans store each page as a large image
- Redundant data: Multiple copies of the same resource embedded separately
More Ways to Reduce PDF Size
- Remove unnecessary pages — use our Delete PDF Pages tool to remove blank or irrelevant pages
- Extract only what you need — Extract PDF Pages to create a smaller document with just the relevant pages
- Convert to grayscale — PDF Grayscale removes color data for significant size reduction
- Split into parts — Split PDF to break a large document into smaller chunks that each fit under the limit
After Compressing
If your compressed PDF is still too large for email, consider these alternatives:
- Share via cloud storage (Google Drive, Dropbox) and send the link
- Split the PDF into multiple parts using our PDF Splitter
- Remove embedded images and replace with lower-resolution versions
Browse all PDF Tools for more document utilities.