How to Combine Multiple PDFs Into One File

Whether you're assembling a set of scanned receipts, combining chapters of a report, or merging signed contract pages, the underlying task is the same: take several PDF files and stitch them into one, in the right order.

How the merge works

Filenary's Merge PDF tool copies each page from your source files, in the order you add them, into a new combined document — the original pages are preserved exactly as they are, at their original resolution and formatting, nothing is re-rendered or recompressed.

Steps

• Open the Merge PDF tool.
• Add your files in the order you want them to appear.
• Reorder if needed, then click merge.
• Download the single combined PDF.

A note on file size

Because merging preserves every page exactly as-is, the combined file's size is roughly the sum of the originals — it isn't compressed during the merge. If the result is too large to email, run it through the Compress PDF tool afterward.

Is it safe for sensitive documents?

Yes — the merge happens entirely in your browser. Signed contracts, ID scans, or financial statements never touch a server.