Is it free to combine multiple PDFs into one file on iPhone?

Yes. Every core FernPDF tool is free, with no account, no watermark, and no trial limits.

Where does the combined document end up on iPhone?

It downloads straight to the Files app, inside Downloads, ready to reopen, AirDrop, or attach to an email straight from there, the normal place Safari on iOS saves anything, not a special location just for FernPDF.

What do the two toggles do?

“Add page numbers” stamps a single continuous count across the whole merged file, so the numbering runs straight through instead of restarting at each source document. “Flatten form fields” bakes filled-in form values into the page as static content, which is worth doing before you send a completed pack to someone who should not be able to change the answers.

Can I reorder files before merging?

Drag any file card. The number badge on it is that file's position in the finished document.

Merge PDF

Merge PDF · iPhone

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.

On iPhone, you tap the drop zone to open the native picker, then choose Files, iCloud Drive, or Photos. Once the combined document is ready, it downloads to the Files app, inside Downloads, ready to reopen, AirDrop, or attach to an email straight from there.

Safari's file picker is a full-screen sheet rather than a floating window, and there's no separate downloads icon on the Home Screen, everything routes through the Files app, iOS's equivalent of Finder.

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 in Safari on iOS. No install, no account.
2Add two or more PDFs: tap the drop zone to open the native picker, then choose Files, iCloud Drive, or Photos.
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. It lands in the Files app, inside Downloads, ready to reopen, AirDrop, or attach to an email straight from there.

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, in this browser tab.

Every FernPDF tool processes files in your browser: read how the privacy model works, or verify it yourself in your network tab.