Merge PDF
Combine several PDFs into one, and drag them into whatever order you want first.
Drop PDF files here
Everything happens on your device — your files are never uploaded.
Drag files to set the order.
0 pages total
Done
What this does
This combines several PDFs into one file. It copies every page from each document, in the order you set, into a fresh PDF and writes that out. Pages are copied whole, so text stays selectable, vector graphics stay vector, and nothing is re-rendered or re-compressed.
Each page keeps its own size and rotation, so mixing A4, Letter, and landscape pages is fine. Per-page content like images and fonts carries over. Document-level extras such as bookmarks, form fields, and attachments from the originals are not preserved in the merged file.
How it works
- 1 Drop your PDF files, or pick them from your device.
- 2 Drag the files into the order you want.
- 3 Click Merge PDF and download the combined file.
Built with open source
- pdf-lib — Creates and modifies PDF documents. · MIT
Frequently asked
Will merging change the quality of my PDFs? +
No. The pages get copied into the new file exactly as they are, with no re-rendering or re-compression, so your text and images look identical to the originals.
Is there a limit on how many files I can merge? +
No fixed limit. Everything runs on your device, so the only ceiling is how much memory your computer has. Two files or two hundred, it's the same.
Are my files uploaded anywhere? +
No. The merge runs entirely in your browser. Your PDFs never leave your device, and the combined file is built and downloaded locally.
Can I set the order of the pages? +
You order whole files, not individual pages. Drag the file thumbnails into the sequence you want, and every page of each file is appended in that order.
Do bookmarks, form fields, or attachments carry over? +
No. The merge copies page content only. Document-level features like bookmarks (outlines), interactive form fields, and file attachments from the source PDFs are dropped.
What happens if my pages are different sizes or orientations? +
Each page keeps its original dimensions and rotation. Pages are not scaled or cropped to match, so a merge of A4, Letter, and landscape pages comes out with each page at its own size.
Can I merge a password-protected PDF? +
Not while it's encrypted. Remove the password first, then merge. Encrypted files can't be read for copying.
Does it work offline and on any browser? +
It runs in any modern browser on any operating system. Once the page has loaded, the merge works without a network connection.