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How to Open Multiple PDFs at Once for Multitasks

In the digital age, PDFs have become the default standard for sharing documents and information. It is not surprising to find many PDF documents on your desktops or mobiles. After all, we are dealing with multiple PDF files day in and day out. In many scenarios, you may be required to open multiple PDFs at once. You may require these files to be opened in the same view so that you can see them together or even compare them. This article answers the question - How to open multiple PDFs at once? The best tool to use is UPDF.

Why You Need to Open Multiple PDFs at Once

In many situations, you wish to open multiple PDFs at once. A few of the situations are listed below -

  1. If you are sending the same PDF file to different stakeholders with minor changes in the content of the PDF file, you will need to track the contents of the files. After all, the files are very similar to each other and only vary slightly in content. If you have to manually compare the contents of the files, it may prove to be a herculean task. This is especially true for very large PDF files. In this case, if you can open multiple PDFs side by side and compare the contents it will ease out the task.
  2. Often you need to read contents from a PDF file and check another very different PDF file for accuracy against it. In this case, it will be best to open multiple PDFs at once and check the accuracy.
  3. If you are in the academic world, you may need to often ensure that students have not copied their assignments or projects. If the assignments are in PDF format and you can open the PDF files from multiple students at once, it will make this job easier.

In all the above situations, you may wonder how to open multiple PDFs at once with UPDF on Windows and Mac.

How to Open Multiple PDFs at once on Windows

UPDF PDF Editor is an all-in-one PDF solution and it has many amazing features to allow you to open, view, edit, annotate, convert, OCR, and protect PDF files. Here is a quick tutorial for you to open multiple PDFs at once on the Windows operating system with it-

Step 1. Download UPDF

The first step is to download and install the UPDF tool. The tool is supported on both Windows and Mac. Launch the UPDF tool on your system.

Step 2. Open a PDF Document

You will now see an "Open File" button on the main interface of UPDF. Click on this button and choose the PDF document on your computer to open a PDF.

Step 3. How Can I Open Multiple PDFs at Once

UPDF tool is a unique tool that supports the functionality of opening different PDFs at the same time. If you want to open multiple PDFs, click the + icon of the top quick access toolbar.

how to open multiple pdfs at once with updf on windows

Each PDF will open in a new tab, like opening tabs in a web browser. Click on the tabs to navigate from one PDF to another. You can open as many PDFs as you like side by side.

how to open multiple pdf files at once with updf on windows

It can also open the PDF in different windows by touching the "+" and selecting "New Window" to open the PDF files in a new window. You can compare these files very easily using the UPDF tool.

open multiple pdfs at once in different window

How to Open Two PDF Files Side by Side on Mac

If you are a Mac user searching for how to open two PDF files side by side, this tutorial has you covered. Follow the below steps to achieve the same and start comparing PDF files easily on your MacBook -

Step 1. Open a PDF Document on Mac

Click on the "File" menu and select the "Open" option. Select one of the PDF files you wish to open to compare.

how to open two pdf files side by side with open file

Step 2. Open Two PDFs Side by Side on Mac

You can now once again click on the "Open" option from the "File" menu and open another PDF file. Right-click this PDF file and select "Move Tab to New Window" to open it on the new window.

how to open two pdf files side by side in different window

After that, you will see that the file opens up in a new window. This creates a comparison view between the files and enables you to compare the contents of both files.

open multiple pdfs at once and show in different window

The Mac version also supports opening multiple PDFs in tabs. The instructions are the same as Windows. You need to click the "+" new tab icon to open a new PDF in the multiple tabs in UPDF. You can click the tab to switch the PDFs for viewing.

how to open multiple pdfs in one window on mac

FAQs on Opening Multiple PDFs at Once

How to Open Multiple PDFs at Once in Adobe Acrobat?

It is possible to open multiple PDFs at once using Adobe Acrobat. However, this tool is way too expensive for users, and the Pro version costs $239.88 per year. That's why many people search for cost-effective Adobe Acrobat alternatives. In this article, I can tell you that UPDF is the best option for you. With only 1/10 price of Adobe, you can enjoy the features to view, annotate, edit, convert, OCR, protect, and organize PDFs.

Can I Open Multiple PDFs at Once Online?

If you are wondering how to open multiple PDF files online, you can use a browser to help you. Drag the PDF files into the browser and they will open. However, it is really frustrating if you don't have internet, or you are worried about your files' security. Don't worry, you can use UPDF to help you. It is an offline tool with stable and high performance when opening multiple PDFs at once.

Why Choose UPDF to Open Multiple PDF Files at Once

It is clear from the above descriptions that UPDF is more feature rich and is a preferred way to open multiple PDFs at once. This can be attributed to the following reasons -

  • UPDF saves your budget a lot. Adobe Acrobat comes with an expensive license cost but UPDF does not even require your credit card details to get you started.
  • UPDF is a modern tool blessed with a delightful interface. UPDF makes your work with multiple PDF documents very seamless. Both technical and non-technical users can quickly get started with the tool. In fact, the tool offers almost any action that you would like to perform on a PDF document. You can edit text and even read the PDF file in a very eyes-friendly PDF reader. You can edit text and read PDF files in a very eyes-friendly PDF reader.
  • UPDF is extremely easy to use. Almost no training or learning curve is required to get started with this tool.
  • UPDF is faster to use. No matter how large your PDF document is, UPDF can open it in seconds.


Due to the above reasons, it is clear that UPDF is the most preferred tool to open multiple PDFs at once. When it comes to the PDF area, you can always rely on this tool. It can help you to do everything you want to do in PDF. If you are interested in this PDF editor, you can tap the download button below to have a trial.