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You can’t upload a PDF to Instagram, for example, because Instagram only accepts image files. This means you can’t upload PDF files to image-based systems. However, PDF files are classified as documents, not images. This may make PDF files seem similar to images. In other words, you can draft a PDF file on a Windows PC and it will look the same on an iPhone, a MacBook, or even a television. They usually have text, links, and sometimes images, but they are viewed universally on all systems. PDF files are like snapshots of document files. Common image file formats are JPG, PNG, and TIFF, for example. Images are files that contain graphical information, usually of a photograph, drawing, or another kind of visual media.
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