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How to Use
- 1Upload at least two PDF files.
- 2Reorder files using the Up/Down buttons.
- 3Click Merge PDF to combine everything into one file.
- 4Download your merged PDF instantly.
About Merge PDF
The Merge PDF tool combines multiple PDF files into one final document in the exact order you choose. Reorder files using the Up/Down controls before merging to get exactly the page sequence you need.
Common use cases include combining report sections from different authors, merging invoices for bookkeeping, assembling contract packages with appendices, and creating presentation handouts from separate slide exports. Any workflow where you need multiple PDFs as a single file benefits from this tool.
Unlike most online PDF mergers that upload your files to a remote server, this tool processes everything directly in your browser using the pdf-lib library. Your documents never leave your device, which makes it suitable for confidential contracts, financial statements, medical records, and any sensitive material.
There is no file size limit imposed by the tool — the only constraint is your browser memory. For most documents (up to several hundred pages), merging is fast and seamless.
Frequently Asked Questions
Is there a file upload to a server?
No. PDF merging runs entirely in your browser, so files stay on your device.
Can I change the file order before merging?
Yes. Use the Up and Down controls to set the order before generating the final PDF.
Is there a minimum number of files?
Yes. You need at least two PDF files to perform a merge.