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How to Use
- 1Upload at least two PDF files by clicking or dragging into the drop zone.
- 2Reorder files using the Up/Down buttons to set page sequence.
- 3Click Merge PDF to combine everything into one document.
- 4Download your merged PDF instantly to your device.
About Merge PDF
The Merge PDF tool combines multiple PDF files into one document in the exact order you choose. Drag to reorder files before merging to get the page sequence you need — no page-level splitting required.
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.
Unlike most online PDF mergers that upload your files to a remote server, this tool processes everything in your browser using pdf-lib. Your documents never leave your device, making it suitable for confidential contracts, financial statements, and sensitive records.
There is no file size limit imposed by the tool — the only constraint is your browser's available memory. Most merges (up to several hundred pages) complete in seconds.
Frequently Asked Questions
Are my PDF files uploaded to a server?
No. All merging runs entirely in your browser. Your files never leave your device, making this safe for confidential and sensitive documents.
Can I change the file order before merging?
Yes. Use the Up and Down controls to arrange files in your preferred order before generating the final merged PDF.
Is there a limit on how many PDFs I can merge?
There is no hard limit. The tool can combine dozens of files as long as your browser has enough memory. For most use cases, this is not an issue.
Can I merge password-protected PDFs?
PDFs that require a password to open must be unlocked first. Files with only owner-level restrictions (print/copy) can usually be merged without issues.
Will the merged PDF preserve bookmarks and links?
Basic page content, text, and images are preserved. Internal bookmarks and cross-document links may not carry over due to browser-based processing limitations.