Combine multiple PDFs into one file. Drag to reorder, all in your browser.
A free, in-browser PDF merger. Drop any number of PDF files, drag them into the order you want, then download a single combined PDF. Everything happens locally in your browser using pdf-lib — your documents never leave your device, so it's safe for contracts, invoices, statements, and anything else confidential.
Add your PDFs
Drag and drop PDF files onto the drop zone, or click Choose files to pick them from your device. You can add more files at any time.
Reorder the files
Drag a file by the handle on the left to move it, or use the Up / Down buttons. Pages are merged top-to-bottom in the order shown.
Merge
Click Merge to combine every page of every file into a single PDF. Larger or image-heavy PDFs may take a few seconds.
Download
Click Download merged.pdf to save the combined document. You can remove files and merge again without reloading the page.
No. Files are read and merged entirely in your browser using the pdf-lib library. Nothing is sent to a server.
There's no hard limit — it depends on your browser's available memory. Dozens of small PDFs work comfortably; very large scanned PDFs may slow things down.
No. Pages are copied between documents without being rasterized, so text stays selectable and images keep their original resolution.
Encrypted PDFs are not supported for reliable merging. Remove the password in your PDF viewer first, then merge.
Basic page content is preserved. Some higher-level structures like bookmarks, form fields, and certain annotations may not carry over — this is a limitation of client-side PDF merging.