Gmail allows attachments up to 25 MB and Outlook.com up to 20 MB, and many company mail servers stop at 10 MB. Upload forms are often stricter still. If your PDF is too large to email, one of these five fixes will get it through, usually in under a minute.
1. Compress the PDF
Most large PDFs are large because of pictures: scanned pages, phone photos, high-resolution images. Compress PDF recompresses those pictures and leaves the text sharp and selectable.
- Balanced is the best first try for scans.
- Target size lets you type the limit, for example 9.5 MB for a 10 MB mail server, and finds the lightest compression that fits.
Step-by-step tips are in How to compress a PDF under 1 MB.
2. Split it into several emails
If the file must stay at full quality, Split PDF cuts it into parts, for example every 20 pages, or into sections such as 1-12; 13-30; 31-. Send one part per email and say in the subject line "part 1 of 3".
3. Remove the pages nobody needs
Blank pages from a double-sided scan, a cover page, an appendix the recipient already has: Remove pages deletes them and keeps the rest exactly as it was. Fewer pages, smaller file.
4. Make it grayscale
Colour scans of black-and-white documents waste space. Grayscale PDF turns the pages grey, which usually makes the file noticeably smaller, and you can compress it afterwards for even more.
5. Share a link instead
For very large files, such as a 200-page scanned report, upload the PDF to your cloud storage (Google Drive, OneDrive, iCloud, Dropbox) and email a link. Keep it private: share it only with the recipient's address, and add a password to sensitive files with Protect PDF first.
Which fix should I use?
- A scan or photos: compress.
- Must stay at full quality: split.
- Has pages nobody needs: remove pages, then compress.
- Hundreds of megabytes: share a link.
All the GrovePDF tools above are free and run in your browser, so your document is never uploaded to us.