Complete Guide: How to Merge PDF Files Efficiently

Merging PDF files is one of the most common document operations in a professional environment. This complete guide explains all available methods to combine your PDF documents into a single file.

Why Merge PDF Files?

PDF merging is useful for grouping a contract with its annexes, consolidating multiple monthly reports into one annual document, creating a complete application dossier, or assembling invoices for organized accounting.

Method 1: Online with APKpdf

The fastest method with no installation. Access the merge tool, drag and drop your PDFs, reorder them as desired and download the result in seconds. 100% local processing.

Method 2: On Mac with Preview

macOS natively supports PDF merging via the Preview app. Open the first PDF, display the thumbnail sidebar, drag the other PDFs into the sidebar in the desired order, then export.

Method 3: On Windows

Windows does not include a native PDF merging tool. Use our online tool or install dedicated software like PDF24 for offline use.

Frequently Asked Questions

Does merging modify the original files?

No. Merging creates a new PDF file without modifying the source documents. Your original files remain intact.

Can I merge PDFs with different page sizes?

Yes. Each page retains its original dimensions in the merged PDF.

Is there a limit on the number of files to merge?

With our online tool, the only limit is your browser available memory.