PDFMerge has a pro app that can handle documents larger than that, though we’d recommend PDFsam if you’re downloading a program. is another option, offering free merging for files up to 15MB. While it won’t be useful for high-definition photos, it’s an invaluable tool for merging document scans on the go. has a useful Merge PDF option that can support individual files up to 10MB per file. If you don’t feel like downloading a program to do your merging for you, there are some free online resources available that can help you. Pages can be added in standard or reverse order, so even if you start scanning from the bottom of a stack of documents, PDFsam will be able to properly order them.

It allows you to quickly and easily merge multiple PDF documents and rotate pages that may have scanned oddly in the first place. This free open-source PDF editing software works on Mac, Windows, and Linux without losing any features across the different versions. When it comes to merging PDFs into one document, the clear king is PDFsam Basic. Which PDF app? Well, if you read our breakdown of the best free PDF editing apps, you might already have an idea. That’s why we recommend you scan your documents individually, and then just piece them together using a PDF app. If you move around or use different office sites, it can become complicated learning all of the nuances of each machine. Those instructions are just for one brand of printer. Repeat this step until all your pages are scanned, then press “Save.” Then when you load the next page or photo to your scanner tray, click the “Page+” button (usually a page with a plus sign in it) to scan the next time. If you’re using scanner without an automatic feeder, you need to go to HP Scan, select Save as PDF to scan your first document.

Each system tends to have their own quirks, requiring you to learn a particular process depending on what you buy. Unfortunately, unless you have purchased a scanner with an automatic document feeder, most scanner models make it complicated to scan multiple pages into a single document. And let’s be real: There’s nothing as frustrating as figuring out how to scan multiple pages into one PDF document. With more entrepreneurs than ever striking out on their own, however, you might need a helping hand.

If you work in an office, someone has most likely trained you in the ways of PDF. Scanning PDFs is a pain, but it’s often a necessary part of doing business.

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