Merge PDF Online Free
Combine two or more PDF files into a single document. Drag them into order, drop any you do not need, and download the merged PDF — everything happens in your browser.
Add at least 2 PDF files. Your files are processed locally and never uploaded.
Merged PDF ready
How to use
- Add two or more PDF files using the drop area or the file picker.
- Use the up and down arrows to set the order the files will be combined in, and remove any file you do not need.
- Click Merge PDFs, then download the single merged.pdf file.
Frequently asked questions
Is my PDF uploaded to a server?
No. Merging runs entirely in your browser with the pdf-lib library, so your documents never leave your device.
How many PDFs can I merge?
There is no fixed limit in the tool — it is limited only by your device's memory. Very large files (hundreds of megabytes combined) may be slow or run out of memory in the browser.
Will the merged PDF keep my files' content and formatting?
Yes. Pages are copied into the new document as they are, including text, images and layout. Interactive form fields and digital signatures, however, are not preserved by the merge.
What order do the files merge in?
Top to bottom in the list shown on the page. Use the ↑ and ↓ buttons next to each file to change the order before you merge.