How to Merge Multiple PDF Files Into One Document

Merging PDFs combines two or more separate files into a single document, in whatever order you choose — the standard fix for anything that needs to arrive as one file instead of a scattered set of attachments.

When you need to merge PDFs

• Combining a cover letter, resume, and portfolio into one application file.
• Assembling scanned receipts into a single expense report.
• Putting together a contract with its signed signature page and supporting exhibits.

How to merge PDFs

• Open the PDF Merger.
• Upload all the PDF files you want to combine.
• Drag to reorder them into the sequence you want.
• Download the single merged PDF.

Tips for a clean merged document

• Check each source file's orientation before merging — a sideways page will stay sideways. Fix it beforehand with the Rotate PDF tool.
• If any file has pages you don't need, trim them first so you're not merging unnecessary content.
• Rename files clearly before uploading so it's easy to get the order right.

FAQ

Is there a limit to how many files I can merge?

You can merge multiple files in one session — for very large batches, it just takes a little longer to process.

Can I remove a page after merging, instead of starting over?

Yes — run the merged file through Delete PDF Pages to remove anything you don't need.

What if I need to split the file apart again later?

The PDF Splitter can break a merged document back into individual files or page ranges.