WhatsApp allows file attachments up to 100MB, but sending a 50MB PDF over mobile data is painfully slow and eats through data plans. Compression makes sharing practical.
Steps
1. Open Compress PDF on your phone's browser.
2. Select the PDF you want to share.
3. Choose Medium or High compression.
4. Download the compressed version.
5. Open WhatsApp → attach the compressed PDF.
Typical Results
A 30MB scanned document compresses to 3-5MB. A 15MB presentation reduces to 2-3MB. These sizes transfer almost instantly on WhatsApp, even on 4G.
Ready to try it?
Use our free Compress PDF tool — no signup required.