Guide: How to use DiffPDF to compare Two PDF Files side-by-side
Software to compare two documents side by side to notice their differences finds many uses. Let’s take the example of PDF documents. PDF documents with the same content can be formatted on different platforms, so they can have structural differences in the way they display the data. PDF formats are known to display differently. Then there may be different versions of the same PDF file. Sometimes these differences are within tolerance limits, and sometimes not. That’s where a freeware like DiffPDF is useful because it can compare two PDF files side by side and highlight the differences. Adobe Acrobat X has a Compare feature that describes changes to the document with a click. But the Pro version will cost you $ 199. DiffPDF is free software and works on Windows, Mac OS X and Linux. DiffPDF is licensed under GNU General Public License (open source). The added plus is that it is portable software. DiffPDF offers you three comparison modes – Words, Characters and appearance. Let’s try it out using the two sample files on the site itself. To start comparing two PDF files, select two of the documents by browsing them from File 1 & File 2 buttonsLoad them and click Compare.
DiffPDF offers you three comparison modes that you can select one by one from the drop-down menu on the right. The default is comparison to Word. Differences are highlighted and you can scroll through each highlighted inequality by clicking Previous – Next button combinations. The scroll bar moves both documents so that you can view the same section in both windows.
By comparing by appearance, you can notice differences in design and page layout, as well as changes in paragraph formatting. Typographic (font) differences are also investigated. Compare by character is useful in cases where logographic languages are used, such as Chinese and Japanese. You can customize the way DiffPDF marks documents by changing things in Options.
DiffPDF has a few more features that help to handle more complex documents:
DiffPDF allows you to set page ranges for comparison where two documents can have different page numbers. DiffPDF has options to exclude margins from the comparison. DiffPDF supports zoning for complex page layouts. Zoning allows the software to recognize page elements such as tables, columns and other text blocks. Pages can be compared on such zones.
If you’re dealing with PDF documents of any kind, DiffPDF is a resource you should have or at least bookmark for the day the need arises. (via Ghacks)
How to use DiffPDF to compare Two PDF Files side-by-side: benefits
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