How to Merge PDF Files on Your Phone (Android and iPhone)

By the DocEpic team · Updated 10 November 2026 · 3 min read

Forms and offices often want one single PDF: all your mark sheets together, a claim with every bill attached, or a scanned document that came out as five separate files. On a computer that is easy; on a phone most people end up installing an app full of ads. You don't need one. This guide shows how to merge PDFs in your phone's browser, put the pages in the right order, and keep the result small enough to upload.

Before you start: find your files

On Android, PDFs you download or receive on WhatsApp usually end up in the Downloads folder or in WhatsApp's Documents folder, and the file picker shows both. On an iPhone, save each PDF to the Files app first: open it, tap Share, then Save to Files. Once your PDFs are in one place, merging takes less than a minute.

Merge your PDFs

Merge PDF joins every page of every file into one PDF, in the order you choose. Pages are copied exactly as they are, so text stays sharp and searchable and nothing is re-compressed.

1. Open Merge PDF in your phone's browser and tap to choose your files. You can pick several at once, and add more afterwards.
2. Drag the files into the order you want. The first file's pages come first in the result.
3. If the PDF will be printed on both sides, tick Add a blank page after files with an odd number of pages, so each document starts on a fresh sheet.
4. Tap Merge and download the combined PDF.

Merging runs in your browser, so your documents stay on your phone. Only very large files are sent to our server, and they are deleted right after the result is sent back.

Put individual pages in order

Sometimes the order of the files is right but the pages inside them are not: a back page scanned before the front, or a certificate turned sideways. Organize PDF shows every page of every file in one grid. Drag pages to reorder them, rotate the sideways ones, delete the ones you don't need or insert a blank page, then save one new PDF.

Got photos instead of PDFs?

If some of your documents are photos — a picture of an ID card, a screenshot of a receipt — turn them into PDF pages first with JPG to PDF, which lays each image on an A4 page, and then merge that PDF with the others. You can also add the photos and the PDFs in two steps: photos to PDF, then merge.

Keep the merged file small

Merging adds the sizes of all the files together, so five 1 MB scans make a 5 MB PDF. If the form has a size limit, run the result through Compress PDF, or use Compress PDF to KB to hit an exact limit such as 500 KB or 1 MB.

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