How to combine multiple PDFs into one file on iPhone
You don't need special software to combine multiple PDFs into one file on iPhone. FernPDF runs entirely in Safari on iOS: open the tool, drop your file, download the result. The merged file is assembled in your browser's memory and downloads instantly. It never touches a server.
Files from iCloud Drive or the Files app open directly in Safari, and processing happens on the phone itself: no app to install, and nothing uses your data plan to upload.
Step by step
1Open the Merge PDF tool. No account, no install.
2Drop two or more PDF files into the workspace.
3Drag the file cards into the order you want; optionally turn on page numbers or form flattening.
4Click “Merge PDF” and download the combined document.
No upload · no account · no watermark
FAQ
Common questions
Yes, FernPDF is a web app, so it runs in Safari on iOS with no installation. All processing happens on your device using WebAssembly.
Yes. Every core FernPDF tool is free, with no account, no watermark, and no trial limits.
Yes. FernPDF stitches your PDFs together locally using WebAssembly. The combined file is assembled in memory on your device and never sent anywhere.
Drag any file card to reorder it. The number badge shows the final sequence. You can also remove a file with the × button without re-uploading the rest.