Merge PDF
Combine multiple PDF files into one. Drag to reorder before merging.
Drag and drop files here or click to browse
PDF: up to 50.0 MB each, 10 files max
Frequently asked questions
Are my PDFs uploaded to a server?
No. Zelume's PDF merger runs entirely in your browser using WebAssembly. Your files never leave your device.
Is there a file size limit?
Each individual PDF must be under 50 MB. You can merge up to 10 PDFs at once.
Can I merge password-protected PDFs?
Not directly. You'll need to remove the password first. We plan to add built-in unlock support soon.
Will the merged PDF preserve bookmarks and form fields?
Page content, images, and vector graphics are preserved with high fidelity. Bookmarks and interactive form fields from the source PDFs may not carry over.
Does it work on my phone?
Yes, but performance is best on a laptop or desktop. Very large PDFs may be slow to merge on mobile browsers.