Diff Checker PDF files

Diff tool that allows you to compare files from any device. 100% free online!

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We have already processed 111,220 files with the total size of 123,432 MB

Comparing is the act of evaluating PDF files by finding the relevant, comparable characteristics of each element, and then determining similarity of characteristics to each other. Diff checker tools are used for many reasons, when one wishes to compare text files other one wishes to compare PDF files, a visual comparison is usually the best. This gives you the opportunity to see which elements are changed, if the files should be merged to create one containing all the differences — GroupDocs.Comparison is the best.

If you need to find similarities in your PDF documents that you cannot compare manually because the files are very large, and you want to see all the smallest differences so, then the Comparison is what you need. This online diff checker tool will let you know about all the changes between PDF files because the difference checker compares all elements of your files and displays the result in a few seconds.

GroupDocs.Comparison is a powerful software which allows you to see the difference of PDF files by highlighting changes with red (deleted) and green (added) colors. Also, our diff checker can detect even changes of styles in your PDF file and highlight it with bright yellow color. Compare your documents free on any OS and platform using just your browser. All the computational operations are done at our side. All files are being processed using our native GroupDocs.Comparison document diff checker API which you can also use as an extension in your projects!

GroupDocs.Comparison can work with any languages, detect changes in various structured data of all supported document types.

This free app is provided by GroupDocs.Comparison and handles more than 100 file formats.

How to diff check document

Submit your files

Click inside the file drop area to upload document file or drag & drop a file

Start comparing process

Click on the "Compare now" button

Wait for the files to compare

It can take time if files are huge and have a lot of diffs

Download result

Wait until the comparing is complete and click on "Download result document" button to get compared document.


Is GroupDocs Comparison app free?

Our comparison app is absolutely free. Feel free to use it as much as you want.
What document formats can I diff check?

We support more than 30 modern documents formats. So you can compare text, images, PDFs, Microsoft Word, Excel, PowerPoint, Visio Diagram etc. Full list can be found here.
How can I diff check a document?

First, you need to upload a file: drag & drop your file or click inside the white area to choose a file.Then you will be redirected to the comparison application.
Is it safe to diff check files using free GroupDocs Comparison App?

Of course! The preview files will be available instantly after the file uploaded. We will delete the uploaded file after 24 hours.
Can I diff check documents on Linux, Mac OS, iOS, or Android?

Definitely yes, you can! Our diff checker works online and does not require any installation of any software other than a web browser.
What browser should I use to diff check documents?

You can use any modern browser to diff check documents, for example, Google Chrome, Microsoft Edge, Firefox, Opera, or Safari.
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