FileSenixSometimes, when people open their PDFs, they wonder what makes them so huge. In most cases, there is a good explanation for such a phenomenon. Let's see what makes a PDF large.
The largest part of a document is made up of images. High-quality photos and pictures are large files that increase the overall size of a document.
Fonts can become a problem as well. Sometimes, a PDF contains some additional font files that allow the text to be shown properly on any device.
It is possible that your PDF document has been created by scanning some document. Scanning converts a page into its picture form, and pictures are always larger than pure text.
Some PDF documents may contain hidden data. It includes various annotations, old changes, unused elements that were created while editing the document.
And sometimes, it happens that your PDF wasn't optimized at all, which means that some unnecessary information wasn't deleted.
To sum it up, a large PDF document may have been created due to pictures, fonts, scans, or hidden data.