Compress a PDF on iPhone or iPad
No app needed: this page works in Safari. Tap the box, pick your PDF from Files, and save the smaller copy back.
- 🔒 No upload
- ∞ No limits
- 🎯 Exact size
- ✓ No sign-up
Drop PDFs here or choose filesTap to choose PDFs
🔒 Compressed on your device — never uploaded · No limits · No sign-up
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Key facts
- Works in Safari, Chrome and other iOS browsers — no App Store download.
- Pick files from Files, iCloud Drive, Google Drive or Dropbox via the iOS file picker.
- Tap “Download”, then share or save to Files.
- Add to Home Screen (Share → Add to Home Screen) to use it like an app, even offline.
How to compress a PDF on iPhone or iPad
- Tap the upload box and choose “Browse” to pick your PDF from Files.
- Choose a level or an exact size.
- Tap “Download” → open the share sheet → Save to Files.
Other ways on iPhone
Shortcuts app: you can build a shortcut with the “Optimize File Size of PDF” action, but it offers no size control. Mail: iOS can't shrink PDF attachments, only images. This page gives you exact size targets and batch processing without installing anything.
Frequently asked questions
Where does the compressed PDF go?
Safari saves it to Downloads in the Files app by default; you can change that in Settings → Apps → Safari → Downloads.
Are my PDFs uploaded to a server?
No. Compression runs entirely inside your browser using JavaScript and WebAssembly-grade libraries. Your file never leaves your device, so confidential documents stay private. You can even disconnect from the internet after the page loads and it keeps working.
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