How to Merge Multiple PDF Files

Four simple steps

1. 1

   Select two or more files in Merge PDFs.

2. 2

   Review each filename, page count, and first-page preview.

3. 3

   Drag the files into the final reading order.

4. 4

   Choose Merge PDF and save the combined document.

Tips for the best result

• Original page sizes, orientation, and contents are preserved.
• Use Split PDF first if only part of a source document is needed.
• Remove password protection before adding a protected PDF.

When merging helps

Sending an estimate and invoice as one file, combining chapter-by-chapter reports into a single submission, or tidying separately scanned contract pages — merging shows up in everyday work constantly.

Recipients benefit too: one PDF is easier to read, store, and file than a stack of attachments.

How this differs from upload-based mergers

Most free merge sites upload your files to a server, and some keep them there for a period of time. PDF Tool merges entirely inside the browser, so contracts, invoices, and confidential documents never leave your device.

There are also no daily limits and no paywalls tied to file counts.

Before you merge

Password-protected PDFs cannot be merged as-is — remove the protection first.

If a source PDF contains unneeded pages, extract the useful range with the Split PDF tool first so no editing is needed afterwards.

Arranging the order efficiently

Prefixing filenames with 01, 02 keeps the order visible from the moment you select them; fine-tune by dragging with the first-page previews as your guide.

Adding up the page counts predicts the merged total, and placing a cover or table of contents first makes the combined file easier to navigate.