5 Best software to combine PDF files

Milan Stanojevic
by Milan Stanojevic
Deputy Editor
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  • We have for you the best software to merge PDF formats with extra features like signing, sharing, editing, and viewing documents.
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Manually transferring information found in two PDF files can be an extremely stressful task, especially when each of your documents contains a large number of pages, and with complicated charts and images included.

This task would take days to complete normally, but fortunately, there are software options that can help a lot.

If you ever found yourself in a situation where you needed the information contained in two PDF files to be transferred into one document, but don’t have the time to do it manually?

If your answer to the question above is ‘yes’, then you’ll surely enjoy reading through this article, as we will explore some of the best online tools and software options that allow you to combine the data from two PDFs without corrupting it in any way, and do so totally free of charge.

Read on to find out more.

Top 5 software options to merge PDFs easily

Adobe Acrobat DC (recommended)

Adobe Acrobat DC image

Adobe Acrobat DC is the best software option that gives you the power to easily merge one or more PDF files. One of the best features found in this software is its ability to transfer the file with a link, so it will be easy to open, review, and edit the PDF file. Moreover, Adobe Acrobat is a platform adapted for team collaboration, so you will get real-time notifications whenever someone adds notes or @mentions to your PDF.

A greatly useful feature found in Adobe Acrobat allows you to merge files from Microsoft Office format and images (JPG, PNG, etc.), in order to have a single organized PDF that is easy to share with others. You can use any browser you want in order to manage, combine, and edit your file. 

Most users didn’t know that PDF files can be converted into Word documents with ease.

Adobe Acrobat has an intuitive interface and is easy to use due to the drag and drop features where you can manage the pages from your files in order to look organized on the final PDF document. It is a useful tool when you have to merge a lot of pages.

As Adobe is the most powerful tool in the drawing and designing industry, you can benefit from adding and eliminating customized backgrounds and watermarks for a better aspect.

If you feel a bit confused about how to combine files in Adobe Acrobat DC, you have to go to Combine files tab > Add files. Select whatever files you want to add, edit, and merge and then rearrange them with drag and drop features. After you have the final variant of your work click Combine Files and then Save.

Get Adobe Acrobat DC free  

PDF Merge

PDFmerge - free PDF combine

PDFmerge is a powerful online tool that can also be used offline if downloaded, that can help you easily combine two or more PDF files.

The user interface of both the website and the downloadable application are very user-friendly and are designed to make every option easy and comprehensive.

One of the downsides of using PDFmerge is that it has a limit of 15MB size files. In case you have a large number of PDF files to merge, you would have to take the files one by one.

This can cause efficiency issues when working with a large number of files. If you find yourself in this situation, it is recommended that you use other software options from this list.

The process of merging two PDF files is easier than ever. Just choose the files you want to merge by clicking the ‘choose file’ buttons, and then you can simply click ‘Merge’.

You can also process batch PDF files by using PDFmerge. In order to do this, you will need to select the multiple files you want to process and then click on ‘more files’ to be able to combine 5 or more files into one document.

Depending on the size of your documents, the process should take less than 30 seconds. After the processing is complete you can download your newly merged file on your PC or any other device.

The process of uploading your files to the PDFmerge servers is done by using a secure transfer with encryption connection, so you don’t need to worry about any third party having access to the data inside. More than that, all uploaded and processed documents and deleted after a maximum of 24 hrs from the last login session.

Download or try PDFmerge

PDF Combine

PDFcombine - free pdf combiners

PDF Combine is another great software option that allows you to easily merge two or more PDF files with ease.

In order to get started with using PDF Combine, you can add files to this software by either using the ‘Add’ button, drag & drop files into the window, or click on the button ‘Add Folder’ to import an entire folder with PDFs.

The next step is to adjust the way your PDF files will be combined into one. Choosing this is essential as this is the process in which you build your final PDF document.

In order to reorder the PDFs found in the list on your screen, you can just select the desired file, and then move it by using the up and down arrows on the side of the window.

Now you want to set up the location in which PDF Combine will export your final documents. You can do this by clicking on the ‘Output Path’ button on the lower left side of the window

After everything is set up, you can now just click on the ‘Combine Now!’ button. The task will start instantly and will begin to process the entire range of information contained in your files.

After the process of merging is complete, you will notice a pop-up window that will announce you that the process is done successfully.

Download PDFcombine 

PDFMate Free PDF Merger

PDFMate - free pdf combine

PDF Mate is another very powerful PDF merger software that contains a wide range of other useful features as well. You can use this app to join, combine, and break apart PDFs into usable pieces.

Using this software gives you the power to upload and process large PDF files, delete specific pages from your document if needed, combine specific elements of two or more PDFs, rearrange the information to suit your needs, and can also convert scanned files.

In addition, you can create an encrypted final PDF file. This allows you not to worry about anybody gaining access to your personal data.

With PDF Mate you can combine multiple pdf files fast, can select which pages to be merged, can convert BMP, JPG, PNG, and TIF to PDF, and offers you an option of choosing between 2-in-1 or 4-in-1 page layouts, so you can reduce paper waste and the time spent editing.

If you want to know more about how to use PDF Mate, you can visit the official website.

Here are some of the features of the free version of PDF Mate:

  • Can convert all scanned PDFs to be used as editable and searchable text
  • Can convert files into multiple formats – PDF to Text/ EPUB/ Html/ Image/ SWF/ Word
  • Converts JPG to PDF
  • Allows you to customize every aspect of the way the program runs so you keep everything under control
  • Can personalize the PDF file size, edge, and direction
  • Can set up administrator permissions and choose who can edit, copy or print out the documents
  • Can combine batch PDF files into one with just one click

Download PDF Mate 

Combine PDF


This is very easy to use and fast online tool that doesn’t have a great range of features that the previous software options do, but it still does its job perfectly. You can find other useful tools on the same website, like modules that allow you to convert your PDF files to DOC, DOCX, Text, PNG, etc.

This site can process up to 20 PDF files at once, and you can drag-and-drop them with ease in the merge window. You can, of course, edit the order of the files to be merged, and then simply click on the ‘Combine’ button. The process should only take a short amount of time.

Try Combine PDF 


In this article, we explored some of the best software options to use when you need to combine two or more PDF files into a single file. The features found in the Top5 list we presented today cover a wide range of needs that will surely come in very handy at the right times.

You can choose between fully online PDF combiner software, or download free software to your PC, so you quickly get access to it even if you are not online.

We would love to find out what software option you chose from this list, and how that worked out for you. Please feel free to let us know what you think in the comment section below.

Software to Combine PDF Files FAQ:

  • What is the best free PDF merger?

The best PDF merger is Adobe Acrobat DC as it provides a lot of extra features for editing PDF files.

  • How do I combine PDF files for free?

You have to open Adobe Acrobat DC and go to Combine files tab > Add files. Select whatever files you want to add, edit, and merge and then rearrange them with drag and drop features. After you have the final variant of your work click Combine Files and then Save.

  • Can I merge PDF files without Adobe Acrobat?

Of course, there are software like PDF Merge, PDF Combine, and many more that can do the Adobe Acrobat’s job, so you have to click “Combine files” or another keyword in order to unite files.


Editor's Note: This article was originally published in July 2019 and was revamped and updated in October 2020 for freshness, accuracy, and comprehensiveness.