Semantic Text Compare

Compare by Image Overlay

JS Compare 2 PDF Files by Image Overlay Demo

The simplest way to programmatically compare 2 files either by converting the two documents to images and lay them on top of each other for a pixel-by-pixel comparison.

First File

This document is displayed as red

Second File

This document is displayed as blue

Red and blue colors show where there is no overlap in the document. When lines overlaps they are displayed as black.

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Sample Code


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