iPhone PDF compression
How to compress a PDF on iPhone
Use an offline workflow when the PDF contains scans, IDs, contracts, or personal paperwork.
Recommended workflow
- Open the PDF from Files, Photos, Mail, or another app.
- Send it to PDF Shrink.
- Choose a compression level based on where the file will be shared.
- Save the smaller PDF back to Files or share it directly.
Which compression level should you use?
- Smaller: best when you still need crisp print quality.
- Balanced: best for everyday sharing.
- Extreme: best when email or web upload limits matter most.
Why iPhone-first?
Many PDF files start on the phone: Notes scans, camera scans, signed documents, downloads, and email attachments. Compressing locally avoids a round trip through a server.