PDF Tools
PDF Merge
Combine multiple PDFs into a single file.
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About this tool
Drop several PDFs and merge them into one document in the order you choose. Pages are copied without re-rendering, so quality and selectable text are preserved. Everything happens in your browser — files are never uploaded.
Frequently asked questions
Are the PDFs uploaded to a server?
No. Merging happens entirely in your browser using pdf-lib. Your files never leave your device.
How many PDFs can I merge?
Up to 20 PDFs per merge and 25 MB per file, with a safety cap of 2,000 total pages to protect browser memory.
Will the merged PDF still have selectable text?
Yes. Pages are copied byte-for-byte rather than re-rendered, so text, hyperlinks, and bookmarks survive.
Can I reorder the files before merging?
Yes. Drag the file rows to reorder them — the merged output follows the order shown.