PDF Merge
Upload two or more PDFs, arrange them in the order you want, then combine them into a single document — free, private, and processed entirely in your browser.
or drop PDF files here · From Device
About the PDF Merger
Our free online PDF merger combines multiple PDF documents into a single file. Stitch together monthly reports, combine scanned receipts, or assemble individually scanned chapters into one book — upload your files, put them in the order you want, and merge them in seconds.
Unlike most online tools, merging happens entirely inside your browser using the pdf-lib library — your documents are never uploaded to a server. That means it's fast, works without an internet round-trip, and keeps your files completely private and secure.
How to Merge PDFs
Step 1
Upload two or more PDFs
Drag and drop PDF documents, or choose them from your device.
Step 2
Arrange your files
Use the up/down controls to put your files in the order you want them merged.
Step 3
Merge and download
Click "Merge PDF" and download your combined document instantly.
Frequently Asked Questions
Is there a limit on how many PDFs I can merge?
There's no hard limit, though very large files or a large number of documents may take a moment to process depending on your device's memory.
Are my documents secure?
Yes. All processing is performed locally on your device using the pdf-lib library — no document is ever uploaded to a server.
Can I change the order of the files before merging?
Yes. Use the up and down arrows next to each file to reorder them. The final PDF's pages follow the order shown in the list, top to bottom.
Will merging affect the quality of my PDFs?
No. Merging copies each page exactly as it appears in the original document, so there's no loss of quality, text, or formatting.
Does it cost money?
No. The PDF merger is 100% free to use, with no registration or account required.