You're on the train. Email arrives with a PDF that needs page 7 swapped with page 8 before you forward it. You don't have your laptop and you really don't want to install yet another iOS PDF app.
Safari plus Flint is the answer. Touch-friendly reordering, no install.
Open Flint in mobile Safari
Open reorder PDF in Safari (or Chrome, or any mobile browser). The page loads as a mobile-optimised layout — thumbnails sized for finger taps, controls big enough to hit.
Touch-drag the pages
Tap and hold a thumbnail for half a second until it lifts. Drag with your finger to the new position. Drop. The grid updates. Same drag pattern as desktop, just with touch instead of mouse.
Save back to Files
Tap save. The reordered PDF downloads. iOS shows the standard download options — open in Files, share via email, AirDrop, save to iCloud Drive. Pick wherever makes sense for your workflow.
When iPhone is the right tool
Quick fixes on the go. One- or two-page reorders. Reviewing and adjusting a document someone just sent you. For 100-page massive reorganisations, get to a laptop — touch dragging that many pages is exhausting. Flint works for both; it just won't make a hard task easy.
FAQ
Does it work in iOS Safari and Chrome?
Yes, both. Also Firefox iOS, Edge iOS. Any modern mobile browser.
What about iPad?
Even better — bigger screen, more thumbnails visible. Same Flint URL.
Can I share the result directly?
Yes, iOS share sheet appears after save. Send via Messages, Mail, AirDrop.
Will my file upload to a server?
No. Reordering happens in your browser. The PDF stays on your phone.
Open Safari, drag pages, share. Reorder on iPhone.