PDF merge — combine multiple PDFs into one
Drag and drop multiple PDFs, reorder them, and merge into a single PDF. Runs entirely in your browser.
How to use
Drop or pick two or more PDFs to add them to the list. Drag entries to reorder; the final PDF preserves that order. Choose an output filename and click Merge — the result is previewed and ready to download.
FAQ
- Are the PDFs uploaded?
- No. Merging is performed by pdf-lib running in your browser. Inputs and output never leave your device.
- Can I merge password-protected PDFs?
- No, encrypted inputs fail. Unlock them first with the PDF unlock tool.
- Are bookmarks / annotations preserved?
- Page content is kept losslessly, but bookmarks (Outline) and some annotations may not be carried over due to pdf-lib limits.
- What about very large PDFs?
- Combined inputs in the hundreds of MB may hit browser memory limits. Compress them first if possible.
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