WhatsApp allows 100 MB documents, but large files upload slowly on mobile data and expire from storage. Under 2 MB is the practical target for sending scans to clients.
In practice: (1) Strong preset is fine for chat delivery. (2) Send the compressed PDF as a document, not as a photo, to preserve quality. (3) The download link stays valid for one hour on our side.
Frequently asked questions
Why did WhatsApp convert my PDF to an image?
That happens when you pick Gallery instead of Document. Choose Document to send the PDF unchanged.
Is it safe to send a compressed PDF?
Yes — compression happens on our server and the file is deleted automatically after one hour.
Do it in the full tool
Open Compress PDF for all options, or jump straight to another step below.