;--- title: Web PDF Viewer with Zoom description: ComPDFKit Professional PDF SDK Library for Web, Mobile, Server, and Desktop. Our SDK provides first-rate PDF solutions for your application with features like annotating, signing, and form filling. We power successful projects for businesses across the globe. keywords: Developer Guides, ComPDFKit SDK, Web og:title: Web PDF Viewer with Zoom og:description: ComPDFKit Professional PDF SDK Library for Web, Mobile, Server, and Desktop. Our SDK provides first-rate PDF solutions for your application with features like annotating, signing, and form filling. We power successful projects for businesses across the globe. ​

Zooming ​

ComPDFKit for Web provides super zoom out and in to unlock more zoom levels, and pinch-to-zoom or double tap on the specific area to perform a smart page content analysis, or you can programmatically interact with it by using the following method.

Use the following methods to zoom in/out by a certain zoom value or scale.

// Zoom in.
docViewer.zoomIn();

// Zoom out.
docViewer.zoomOut();

// Scale changed.
docViewer.webViewerScaleChanged(scale);