Need to reduce a PDF file size on your iPhone for email or upload? You can compress any PDF directly in Safari — no app needed, completely free.
1
Open Safari on your iPhone
Go to fourmeld.com/pdf-tools in Safari on your iPhone.
2
Upload your PDF
Tap Upload and select your PDF from Files app, iCloud Drive or email attachment.
3
Choose compression level
Select Standard (good quality, smaller size) or Maximum (smallest file, reduced quality).
4
Download the compressed PDF
Tap Compress PDF and then Download. The PDF saves to your Files app.
Tips
- Open email attachments in Safari by tapping "Open in Fourmeld" after long-pressing the PDF link
- Standard compression reduces file size by 30–60% with no visible quality loss
- Maximum compression is best for emailing when file size is the priority
Compress a PDF on iPhone — Free
Works on any device in your browser. No app download, no signup.
Try Fourmeld PDF Tools Free →FAQs
Can I compress PDFs saved in iCloud?
Yes — select from iCloud Drive when uploading.
Where does the compressed PDF save?
It saves to your Files app. You can then share it via email or WhatsApp.
Does it work without WiFi?
An internet connection is required as processing happens on Fourmeld servers.