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PDF Merger

Combine multiple PDF files into one document.

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Drop PDF files here or click to select

You can select multiple files at once

What the PDF Merger does

This tool combines several separate PDF files into one continuous document. Add your files, drag them into the order you want, and the merger stitches them together and hands back a single PDF to download. All of this happens inside your browser, so your documents are never uploaded to a server — an important point when you are dealing with contracts, statements or anything confidential.

Merging is one of the most common PDF tasks: pulling scanned pages into a single file, combining chapters or reports before sending, assembling an application from multiple forms, or joining receipts and invoices for record-keeping.

Order, quality and privacy

The order you arrange the files in is exactly the order the pages appear in the final document, so you can reshuffle them until the sequence is right before merging. There is no fixed limit on how many files you combine, though very large documents naturally take a little longer to process.

Because the merger simply joins the existing pages rather than re-encoding them, the quality of your text and images is preserved exactly — nothing is recompressed or downgraded. And since the work is done locally, the files you merge stay entirely on your own machine.

How to use it

Select or drag in the PDFs you want to combine, use the up and down controls to set their order, then click Merge PDFs. The combined file downloads automatically. If you need the opposite operation — pulling one PDF apart — pair this with the PDF Splitter, and use the PDF Compressor afterwards if the merged file is larger than you'd like.

Frequently Asked Questions

How do I merge PDF files?▼
Upload multiple PDF files, arrange them in your preferred order using the up/down arrows, then click 'Merge PDFs'. Your browser will combine them and download the result.
Is there a limit on how many PDFs I can merge?▼
No limit. You can merge as many PDF files as you need. However, merging many large files may take more time.
Will the PDF quality be affected after merging?▼
No. Our merger preserves the original quality of all pages. It simply combines the PDF documents without re-encoding or compressing the content.
Are my PDF files kept private?▼
Absolutely. All merging happens locally in your browser using PDF-lib. Your files are never uploaded to any server.
Can I reorder pages before merging?▼
Yes. After uploading files, you can use the up/down arrows to reorder the files before merging.

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