How to Compress Large Scanned PDF on Phone for Email
Scanned 30 pages and the PDF is 50MB? Learn how to compress mobile PDFs down to under 5MB for easy sharing over Gmail, Outlook, or WhatsApp.
To compress large PDFs on Android: 1) Open ScanOrbit PDF Tools and choose Compress. 2) Select your PDF. 3) ScanOrbit downscales unneeded 600 DPI over-sampling to standard 200 DPI A4 resolution. 4) Save a compact, email-ready PDF with razor-sharp typography.
1. Why Mobile Scans Get Huge
Phone cameras shoot 50-megapixel photos. Uncompressed, each page can take 8MB. Compressing scales the canvas down to ISO A4 dimensions (1654x2338 at 200 DPI).
2. Select Compression Level
Choose between Standard (optimal balance of file size and visual fidelity) and High Compression for documents with text only.
3. Export Email-Ready PDF
The file is saved instantly in your local storage without cloud processing delays.
Compress PDFs Locally Without Cloud Limits
Try ScanOrbit PDF Tools on Android for free.