Whether you are assembling a job application, a client deliverable, or a scanned archive, merging PDFs is one of those five-second tasks that somehow involves either paid software or a sketchy upload site. It does not have to.
Merging locally in your browser
Our Merge PDF tool combines files entirely on your device. Add the PDFs, drag them into the right order with the move arrows, and download one combined document. Because nothing is uploaded, it is safe for contracts, medical records, and financial statements.
Three mistakes to avoid
Wrong page sizes mixed together. Merging an A4 report with letter-size scans works, but the result looks uneven in print. Consider cropping margins first for a consistent look. Merging when you should organize. If pages inside one file are also in the wrong order, fix that first with the Organize PDF tool. Forgetting page numbers. A merged 60-page packet without numbering is hard to reference in a meeting — add page numbers after merging, not before.
After the merge
Large merged files often benefit from a compression pass — see our PDF compression guide. And if the combined document needs a signature on the final page, the Sign PDF tool handles that without leaving the browser.