Merge PDF
Merge several PDFs into one file for free — processed in your browser, files are never uploaded. Drag to reorder, then merge in one click.
100% browser-based · files never uploaded
Drag files here, or click to choose
Drag, click to choose, or paste with Ctrl+V · Up to 50.0 MB per file
Settings
🔒 Your files never leave your browser
Related tools
- Split PDFSplit a PDF by page count, page range or a hand-picked selection — processed locally in your browser, downloadable as a single file or a ZIP.
- Remove PDF PagesTick the pages you do not want and keep the rest — preview the thumbnails first, nothing is uploaded.
- Reorder PDF PagesDrag the thumbnails into a new order — the final PDF follows the order you see from top to bottom and left to right.
Frequently asked questions
- Are the PDFs uploaded to a server when I merge them?
- No. Merging happens locally in your browser with pdf-lib — the files never leave your computer.
- Can I change the order?
- Yes. After dropping the files in, use the arrows to reorder them, then merge in one click.
- Are there limits on pages or file size?
- It depends on your browser memory, which is plenty for everyday contracts and invoices. Compress very large scans before merging them.
- How do I add page numbers after merging?
- Once the file is merged, open the "PDF header, footer and page numbers" tool to continue.