WebViewer is a JavaScript-based PDF SDK for building document functionality in web apps.

SDK Features

Industry

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Compare

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Semantic text compare
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Compare by image overlay
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Compare documents visually by converting the two documents to images to 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.