How to Merge PDF Files on Android or iPhone

Choose files on a phone

The available file-picker options depend on your device and browser.

You may see:

• Files;
• Downloads;
• Photos;
• cloud-provider shortcuts;
• camera or image sources.

Choose only the files required for the job and return to the browser after selection.

Arrange files with touch controls

Merge PDF changes the order of complete source files.

On a touch screen, move complete source groups into the required order and check the page previews before processing.

Pages inside each source PDF remain together.

Add photos or images

JPG, JPEG, and PNG images may be added to the same merge job as PDFs.

Each image becomes one PDF page at 96 PPI.

Large phone photos may consume significant device memory, so resize extremely large images before merging if necessary.

Image Resizer →

Context links

• Image Resizer →

Watch device memory

Browser-side document processing uses the phone or tablet's memory and processor.

Large PDFs, many pages, or high-resolution images may take longer and can exceed the resources available to the browser.

If a browser tab reloads or becomes unresponsive:

1. keep the original files;
2. close unnecessary tabs/apps;
3. retry with a smaller supported batch;
4. reduce oversized images before trying again.

Save and verify the result

After the merge finishes, download the PDF and reopen it from Files or Downloads.

Check the page order, orientation, and final page count before emailing, uploading, or sharing the document.