Empower yourself with PDF comparison tools from Softinterface.  


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IBM - a Softinterface pdf  comparison tool customer Great customer service, prompt attention to our requirements and lightening speed development has been my experience with the staff at Softinterface Inc. Within a few hours of installing... Bruce King, IBM Canada, Toronto, Ontario

PDF Comparison Software User Testimonial Your products are very impressive, easy to use and script compatible, for what we desired in the management of MS Word and Excel files. Thank you for your continue contact with me in regards to these tools. Mark Purinton EMC Corporation

"We look forward to using your product and potentially working together in the future"  Bob Free, Adobe

“We like the product. It is fast and accurate. It seems to pick up all of the differences in the documents, and it does a good job of displaying those differences. We like the easy to use interface. That is why we bought it!” Richard M. Baker


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PDF comparison Software Is Free From spyware, adware and viruses

PDF Comparison with 'Diff Doc'

When you compare PDF files, you demand fast and accurate results, and now you can have it.  'Diff Doc' is a powerful yet easy to use folder/file compare and remediation utility. Use it to compare files of all types including MS Word/Excel/PowerPoint, PDF, RTF, Text, XML, HTML and more.  Our document comparison utility works the way all software should -- accurately, quickly, simply, and affordably.

Compare PDF

(Windows 10, 8, 7, Vista, XP, 2000, NT, 64 & 32 bit)

Regardless of the editor you are using (MS Word, Excel, Wordpad, Notepad, etc.), simply load the original and modified files, press the Refresh button diff PDF Files (or F5), and the document comparison will display promptly. Additionally, you can compare folders to see exactly what files have changed before doing a detailed file comparison.

 See an  online video. Movie Demonstration of Document Comparison Software

'Diff Doc' can display the file differences in two possible views, 'All In One', or 'Side By Side'. Both views have their advantages, and switching between them is as easy as a mouse click (or F6). Lastly, there is a large selection of report types and options available for sharing the differences found with your peers.

It is the best document comparison tool you've never tried.... till today!  Click here to download and get your free trial

Need more details? Click here for full documentation.  A feature list and a quick overview of usage follows below.

'Diff Doc' Features

  • Compare PDF documents, MS Word, Excel, PowerPoint, Rich Text (RTF), Text, HTML, or XML and retain formatting.

  • Word to word or letter to letter comparisons. See to the letter what changed in a sentence.

  • Compare files of any type against any file type (i.e. Compare PDF to a Word document).

  • Choose any portion of any document (file) and compare it against any portion of the same or different document (file).

  • Both 'Side By Side' and the 'All In One' difference views are supported.

  • Change the colors and formatting used to highlight the document changes.

  • Integrated into the Explorer Shell (Windows Explorer, Desktop, Find In Files etc. ) for quick comparisons. Use the Right Mouse click to initiate.

  • Navigate easily through the file differences with the Next (F7), Previous (Shift+F7) etc. navigation buttons.  Or use the drop down list box to jump to a specific difference.

  • Paragraph differences are highly detailed.

  • Compares text from any application by cutting and pasting into 'Diff Doc'.

  • Save any of the views as DOC, Text, RTF or HTML format.

  • Detailed HTML Reports now possible allowing of printing and e-mailing results quickly.  Both Side By Side and All In One compare reports are supported.

  • Text and Comma Delimited reports also available.

  • Compare folders first, then quickly see what files are different and compare with a mouse click.

  • Compatible with WorldDox, and any other document management software that supports 3rd party file comparison applications through the command line. Click here for details.

  • Can be adapted for all languages.

  • Run it from the Command Line or build your own solutions by using the ActiveX COM interface (available upon request).


Using 'Diff Doc' To Compare PDF Documents

Using 'Diff Doc' is as simple as copying and pasting (or loading) the files into the application, then pressing the "Show Differences" button (or F5). Of course, there are several options and features that need to be discussed so that you can fully leverage 'Diff Doc's capabilities.

There are 3 main tabs within the program, "Compare PDF Files Compare Files", "PDF Comparison Compare Options" and "Diff PDF Files Report Options". Each tab is discussed in detail below.

Compare PDF Files  Compare Files

It is within the 'Compare Files' tab that you will spend most of your time. There are 3 (or at most 4) editor boxes displayed.  The top two editors are referred to as the "Original editor" and "Modified editor" (Hint: you can hide them by pressing F8). The text editors below are referred to as the 'Diff editor(s)'.  It is within the Diff editor(s) that the differences between the Original and Modified editors are updated and shown by the program.

The first step to comparing is to load both the Original and Modified editors either by selecting files, copying and pasting data, or composing new text.  Use the File menu item to load files, or position the mouse over the file you wish to load within Windows Explorer, and use the right mouse click to display the context menu.  Copying and pasting is done differently for different programs.  However, in most cases, simply highlighting the text, and pressing CTRL-C will copy text to the Windows Clipboard.  To paste, simply click on the Original or Modified text box, and press CTRL-V.

Once the Original and Modified editors contain information to be compared press the refresh button PDF Comparison (or F5). The differences between the Original and Modified editors will then be displayed in the Diff editor(s).  You can stop the comparison process by pressing the abort button on the toolbar Diff PDF Files.

'Diff Doc' will use the color codes and formatting in the table below by default. You can change these highlighting items within the 'Compare Options'\View tab. 

Color Meaning
Changed Change has occurred.  Original text is shown as red, bold, with a strike through, whereas the Modified text is shown in bold red.
Added An addition to the Original document has occurred.  It is shown in bold green.
Deleted A deletion from the Original document has occurred.  It is shown in bold blue with strike through font.

How Differences Are Highlighted (customizable)

Navigation of the Differences Found (F7, Shift-F7)

Once the difference view has been refreshed, and at least one difference has been found the navigation toolbar/keys may be used.  The table below shows the available commands:

Button Purpose
Compare PDF Ctrl-Shift-F7 Jump to first difference

PDF Comparison  Shift-F7

Jump to previous difference.

Diff PDF  F7

Jump to next difference

Compare PDF  CTRL-F7

Jump to last difference

PDF Comparison  F4

Jump to difference you specify

There is also a drop down list box in the toolbar which can be used to jump to a specific difference.

Toggle between Views (F6)

The largest button within the toolbar will alternate the diff viewer between the "All In One" and "Side By Side" views.  Typically, those dealing with literary content will like the "All In One" view, whereas programmers dealing with source code will like the "Side By Side" view.  Alternating between views also gives you a feel for how the red-lining really works.

Diff PDF Files Create Reports (F2)

The "Report" button (or F2) will create the report as specified in the " Report Options" tab.  You can also print or save any of the editors by using the right mouse button, or select the editor with the left mouse and then go to the file menu.

Compare PDF Files Swap Text within the Master and Source (F9)

The Swap text button (or F9) will take the text within the Original and Modified editors and exchange them, and then automatically refresh the diff viewer. 

PDF File Comparison Compare Options

The "Compare PDF Files Compare Options" tab has many items, but the most important are items shown below:

Setting Description
Ignore Case Ignore character upper and lower case differences when comparing
Ignore White SpaceIgnore Whitespace Characters Tabs, spaces etc. will be ignored when comparing
Ignore Empty Lines Ignore lines that are completely empty when doing a file comparison. White space characters alone will make a line not empty.
Beep When Done When set, a system beep will occur when the file comparison has completed.
Remove formatting To do a pure text comparison, check this option to remove all formatting when comparing documents.
Letter by letter comparison Compare to the letter if enabled, otherwise by the word.


diff pdf file Report Options

Pressing the F2 creates the report after a comparison has completed. The "Compare PDF Files Report Options" tab allows you to select the type and style of the report created.  There are 4 report file types: MS Word, HTML, Text, and Comma Delimited.  MS Word style reports come out with the best detail, and have options to specify exactly what you want within report. HTML reports have an additional option of specifying either "All In One" or "Side By Side" view. 

Printing and  E-Mailing Reports

Once the report is created it is shown in an appropriate application.  DOC is shown in Word and HTML reports are shown in a browser, both of which have the ability to save, print and e-mail (see the file menu).  Other reports may show up in Notepad, which can be printed, edited or saved from there.

"I found a product called Diff Doc that seems to work quite well for comparing Word documents against other Word documents! (I don't know how well it works with WordPerfect, though the documentation claims that it is supported). Like many of you, I was looking at DeltaView and was very upset at their inability to work with us on the pricing structure. Diff Doc can also run from command line, so integration with document managers is a snap (the author modified the code over a couple of hours for me to get it to work with WORLDOX Versioning. In return, I wrote his FAQ on WORLDOX integration). Download an evaluation copy at https://www.softinterface.com" 'Diff Doc'  Troy Piersma excerpt from a TechnoLawyer Newsletter.

"Just read the TechnoLawyer post from Troy Piersma. I concur completely.  I recently left a big firm which used DeltaView, and looked to get an equivalent program after being blown off by the DeltaView sales rep because I wasn't big enough for their policy. My Tabs and Practices master reseller, Judy Lassek, had also put me in WORLDOX, with which I am very pleased. She had heard of DiffDocs through her network, and I downloaded it and tried it out. I had a hard time comparing versions of the same document at first, but after receiving an update from DiffDocs, it has worked very well for me. My practice is transactional, requiring revising contracts regularly, and the program works great for doing that kind of comparison. I recommend that solos and others try it out, if for no other reason than the company is such a refreshing change from its competition! However, that wouldn't make much difference if the product itself weren't good."  Michael V. Mulchay, PLC

Your products are very impressive, easy to use and script compatible, for what we desired in the management of MS Word and Excel files. Thank you for your continue contact with me in regards to these tools.  Mark Purinton EMC Corporation  'Diff Doc'  + 'Convert Doc'

PDF Comparison from SoftInterface, Inc.  Your software solution provider!

* Diff PDF is short for PDF Comparison.  That is, ' compare PDF ' and ' Diff PDF ' are the same phrase.