How to make a PDF smaller for email
When a PDF is too large to attach or upload, start with the least destructive compression mode that gets under the size limit.
Compress the PDF and compare the actual before-and-after size.
Start with Preserve mode when selectable text, links and forms matter. If the file is still too large, Balanced or Strong can reduce image-heavy pages more aggressively by re-rendering them.
Compress PDF →Reduce a PDF for email
- Choose the PDF.Keep the original file until you verify the result.
- Try Preserve mode first.This keeps document structure but may not shrink an already optimized PDF.
- Use Balanced or Strong only when needed.These modes can make scanned or image-heavy PDFs much smaller, but may flatten text, links, forms and layers.
- Check the real output size.Use the smallest change that satisfies the email or portal limit.
Why some PDFs barely shrink
Many PDFs already contain compressed images and optimized objects. There may be little safe space left to remove without changing page content.
Keep the original
Strong size reduction is a delivery copy, not a replacement for an editable or interactive source document.