PDF tools for Android: merge and compress with no app
Android has no single PDF tool that every phone shares, because what is built in depends on the manufacturer and the Android version. This page covers what you can usually do without installing anything, and how to merge, compress and combine photos into a PDF in Chrome when the phone does not do it.
Android has no one built-in PDF merger. What is included varies by manufacturer and version. We found no merge feature in Google's own Drive and Files apps, so check your phone maker's apps first, then use a browser tool.
What an Android phone can usually do on its own
Most phones open PDFs in Google Drive or a viewer from the manufacturer, and Chrome opens them too. Two things work on nearly every phone. The Google Drive app can scan paper with the camera and save the pages as one PDF. Any app that offers Print can usually save its page as a PDF instead of sending it to a printer, which turns a web page or an email into a file.
Beyond that, the picture splits by brand. Some makers, Samsung among them, add their own file manager and note apps with PDF features, and those change between phone models and updates. We cannot list them for you accurately, so look in your phone's own apps before anything else.
Where Android stops
Google's Drive and Files apps are for storing, scanning and viewing. We did not find a way to combine several existing PDFs into one in either, or to compress a PDF to a size you choose, or to set a password on one. Those are the jobs a browser tool covers, and Chrome on Android runs it like any website.
How to merge PDFs on an Android phone in Chrome
- Open the Merge PDF tool in Chrome.
- Tap the drop area and choose your PDFs from Downloads, Drive or another folder on the phone.
- Put the files in the order you want, using the move buttons on each card or by dragging.
- Run the merge, then save the combined PDF. It lands in your Downloads folder.
The files are joined inside the Chrome tab and are not uploaded. If a very large file stalls the tab on a low-memory phone, merge in two smaller batches.
How to make a PDF from photos or a scan
For one document with several pages, the Drive scanner is the quickest route, and it keeps the pages in order. If you already have photos in your gallery, open Images to PDF, add them, put them in order and download one PDF. JPG to PDF does the same for JPG files.
Photographed pages are large. A phone camera can produce several megabytes per photo, so the next step is often compressing the result.
How to compress a PDF on an Android phone
Open Compress PDF to an exact size, pick the limit your form states, and download the result. Phone photo scans shrink well. For a limit like 200 KB try the 200 KB page, and for email 5 MB.
Processing runs on the phone, so a big file on a budget handset takes longer than on a laptop. It does not use mobile data to upload anything, which is also why it keeps working on a slow connection once the page has loaded.
Signing a PDF on Android
Use Sign PDF to draw or type a signature and place it on the page with your finger. It adds a simple electronic signature image. It is not a qualified or certified digital signature, so check whether your recipient needs one.
Limits on Android
Phones vary a great deal. A budget Android with 2 or 3 GB of memory can struggle with a large scan or dozens of full-size photos, because the work happens in the Chrome tab. If Chrome reloads the page during a merge, close other tabs, process fewer files at a time, or compress the biggest one first. Once a page has loaded, the tools keep working with the connection off, but a closed tab will not reopen offline.
No app to find or trust
PDF apps on the Play Store vary in quality and often ask for storage or account access. A web page asks for neither, and closing the tab removes it.
The same on every phone
Built-in PDF features differ between Samsung, Pixel and other phones. The tools here are the same web pages on all of them, in any current version of Chrome.
Your file does not leave your phone
Files are processed in the browser tab and are not uploaded, so your mobile data is not spent sending a large PDF anywhere.
Tools that work great on Android
Every other tool on the site works the same way on an Android — see the full list.
Tips for using these tools on Android
- 1Pick files from the Downloads folder or Drive in Chrome's file picker, so you know which copy you are merging.
- 2After compressing a phone scan, zoom in on a page to check that small print is still readable before you submit it.
- 3Add the tool to your home screen from Chrome's menu if you merge PDFs often.