Merge PDF Files — Combine & Reorder, 100% In-Browser
Combine multiple PDF files into one clean document right in your browser. Add as many files as you need, drag them into the exact order you want, and optionally skip individual pages before merging. Everything runs locally on your device with pdf-lib — nothing is uploaded, and your documents never leave your computer.
Frequently Asked Questions About Merging PDFs
How does Merge PDF work?
Drop or browse to select several PDFs. Each file shows its page count and a preview of its first page, and you can expand any file to choose exactly which of its pages to keep. Drag the file rows into the order you want, then hit "Merge files" — the pages are combined with pdf-lib and downloaded as a single new PDF.
Can I merge files with different page sizes?
Yes. Every page is copied exactly as it appears in its original document, so A4, Letter, and landscape pages can all live in one merged file.
Are my original files modified?
No. The merger only reads your files and builds a brand-new combined document. Your originals are never changed, and nothing is uploaded anywhere.
Do I have to merge at least two files?
No — you can also merge pages of a single document (for example, to keep only certain pages in one file). But the tool really shines when you combine several documents, like multiple scanned chapters or attachments, into one.