How To Compare Two PDF Files [Efficient and Easy Way]

Last updated on February 6, 2023

Summary :

Comparison of two PDF documents can help you effectively proofread and identify the differences between the two versions to mark, the following step-by-step instructions can help you more efficiently compare.

Compare Two PDF Files [Efficient and Easy Way]

When you are collaborating and editing a PDF, you may need to compare and proofread two or more versions of PDF files. Therefore, if there is a tool that can directly present the PDF files you need to compare for viewing and annotating, your work efficiency will be greatly enhanced and your workload can be reduced accordingly, achieving a half-hearted result.

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How To Compare Two PDF Files With PDFgear

PDFgear is a PDF editor that exists in a unique form in a highly competitive market. It is a completely free but full-featured PDF all-in-one manager. If you need to convert, compress, merge, split, rotate, and edit PDFs, then PDFgear can be one of your best choices. If you want to compare two PDF files, then PDFgear can also help you do it.

Step 1. Get the PDFgear Desktop Version

Although PDFgear has both online and offline tools, the online version cannot compare PDF files. So you need to download and install PDFgear by going to the PDFgear official website.

Install PDFgear Desktop Software

Install PDFgear Desktop Software

Step 2. Open PDF Files in PDFgear

After successful installation, you can open PDFgear software by double-clicking the desktop icon. On the main page, you can see the “Open File” portal to browse and add local files.

Open PDF Files in PDFgear

Open PDF Files in PDFgear

Step 3. Compare PDF Files in PDFgear

When you upload a PDF document, you can automatically enter the reading and editing mode, then you just need to repeat the above steps to add a PDF file again to have two different windows to display the two PDFs you need to compare, and then adjust the borders by dragging the mouse to align the two PDFs side by side for easy viewing and annotation. You can add highlighting, underlining, graphics, comments, etc. to mark the differences.

Compare and Mark PDF Files in PDFgear

Compare and Mark PDF Files in PDFgear

How To Compare Two PDF Files With Adobe Acrobat

Adobe Acrobat has always been loved and supported by many users. The powerful feature overlay makes it easy to compare two PDF files in Adobe Acrobat. And you can also compare PDFs in the annotations, add images, change the text, change the highlighting, and other operations to distinguish the difference.

Step 1. First, you need to open the Adobe Acrobat on your device. Then locate the Tool of “Compare Documents”. Click the “Add” button to add a document.

Navigate to the "Compare Documents" Function Button in Adobe Acrobat

Navigate to the “Compare Documents” Function Button in Adobe Acrobat

Step 2. Upload two PDF files that need to be compared, enter the main interface of the comparison function after you will be asked to upload two PDFs to the two different boxes. Select older version to add to the left side, and the new version should be uploaded on the right. If you do not need to compare the differences between the graphics please check the “Compare Text Only” box. You can also click the gear-shaped button for more settings.

Upload Two PDFs to Adobe Acrobat

Upload Two PDFs to Adobe Acrobat

Step 3. Click the “Compare” button below and you will see the generated compare results summary in a new document. If you want to see the details of the specific differences between the two articles, then just click “Go to First Change” to enter the comparison view mode, and select “Side-by-Side” as the view setting to compare both sides.

Compare Two PDF Files in Adobe Acrobat

Compare Two PDF Files in Adobe Acrobat

How To Compare Two PDF Files With Google Docs

Google Docs is a very useful online collaborative document assistant. It can support multiple people to edit online at the same time, and you can also set different people’s viewing rights. If you want to compare two PDFs, you can do it in Google Docs.

Step 1. Because PDFs can not be opened directly through Google Docs. So you need to convert PDF files to Google Docs documents first, and then open the document in Google Chrome.

Open PDF Documents in Google Docs

Open PDF Documents in Google Docs

Step 2. You can see a lot of function buttons displayed in the upper left corner of Google Docs. At this time, you need to locate the “Tools” function button, click the drop-down menu in it, and select “Compare documents”, in the pop-up window to compare the selection and upload of documents. Finally, click “Compare” to start comparing.

Upload the Comparison Documents to Google Docs

Upload the Comparison Documents to Google Docs

Step 3. After the comparison progress bar is loaded, you can click “Open” to open the difference results automatically marked by Google Docs for you. The results will be displayed in the comment box on the right. And the text will be marked by underlining or changing the color.

Automatically Compare Two PDF Files in Google Docs

Automatically Compare Two PDF Files in Google Docs


How To Compare Two PDF Files Online for Free?

When you are limited in storage space, the best service you can get is an online tool. Google Docs can help you. You just need to convert your PDF files to Google Docs, and then open a document when you click “Tools-Compare documents” to select another file to compare.

How To Compare Documents in Adobe?

As we all know, Adobe Acrobat is powerful and rich in functions. The comparison of two PDF files can be a breeze. Therefore, you just need to follow the steps below to operate: find “Compare Files” in the toolbar and then upload the two PDF files that need to be compared to the pop-up page.

How To Find the Difference Between Two PDF Files?

To better find the comparison and differences between two PDF files, we can use some means to find the differences between them. When you need to compare the PDF files uploaded to Adobe Acrobat, you can set her to automatically help you identify and mark the differences. This is very intelligent.

Can I Get a Report of Comparisons in PDF?

If you want to quickly identify the differences between two PDF documents when comparing them, then a tool that automatically identifies and marks the differences for you will be much appreciated. This report will contain a summary and comparison of the results.


Many tools are available to help you compare and view PDF files. Of course, if you have enough time and effort, you can try every available method at once. The above ways are relatively simple and quick. Go and try to use the comparison tools for two PDF files to proofread the joy of it.