Merge PDF Files
Combine multiple PDFs into one file for free. Reorder, add, or remove pages visually — all processing is client-side and completely private.
NEXT_PUBLIC_ADSENSE_PUBLISHER_IDNEXT_PUBLIC_ADSENSE_PUBLISHER_IDHow to use Merge PDF Files
Add your PDF files
Drop two or more PDF files into the drop zone. You can also click to browse and select files.
Reorder documents
Drag the file thumbnails to arrange them in the order you want in the final PDF.
Merge
Click Merge PDFs. pdf-lib combines all documents page-by-page entirely in your browser.
Download merged PDF
A single merged PDF is ready to download immediately.
Frequently Asked Questions
How many PDFs can I merge at once?
There is no hard limit on the number of files. Merging dozens of large PDFs at once depends on available browser memory.
Will bookmarks and hyperlinks be preserved?
Internal hyperlinks within each document are preserved. Cross-document bookmarks are not automatically merged in this version.
Is this tool free?
Yes, completely free and requires no account. The tool is funded by non-intrusive display advertising.
Can I merge password-protected PDFs?
Password-protected PDFs must be unlocked before merging. The tool will display an error if a locked file is detected.