How to merge PDF files

Merging combines several PDFs — or a mix of PDFs and images — into one file, in the order you choose. It's one of the most common PDF tasks and, done right, is lossless.

How merging works

A merge doesn't re-render your pages or squash their quality. It copies each source page — text, fonts, vectors and all — into a new document and rebuilds the cross-reference table. The result is as sharp as the originals.

Steps

• Gather the files you want to combine.
• Add them in the order you want, or drag to reorder.
• Optionally rotate or drop pages you don't need.
• Save the combined PDF.

Tips for clean merges

• Check page order before exporting — it's easy to append a file the wrong way round.
• Mind mixed page sizes: a merged file can contain A4 and Letter pages together, which some printers handle awkwardly.
• If the file feels large afterward, see how to compress a PDF.

Privacy note

Because merging often involves contracts, invoices, or IDs, think about where it happens. A browser-based tool merges without uploading anything. In FreshPDF you can even drag extra PDFs straight onto the canvas to merge them.