Merge PDF Files
Combine up to 10 PDF files into a single document in the order you choose, entirely in your browser.
- Runs in your browser
- Free to use
About this tool
Merge PDF Files joins several documents into one without installing software or uploading anything: the pdf-lib library runs in your browser, copies every page of each file in the order you set with the arrows, and produces a single PDF to download. Contracts, scanned pages, invoices and reports can be combined in seconds.
To get the pages as images instead, use PDF to Image.
How to use it — quick steps
- 01
Add the PDF files
Drop two to ten PDFs on the dashed area or choose them; they are listed in the order they were added.
- 02
Arrange the order
Use the ↑ and ↓ arrows next to each file to set the sequence; the numbers show the final order.
- 03
Press "Merge PDF files"
The pages are copied into a single document in your browser and a download link appears below.
Key features of this tool
You control the order
Numbered list with move up / move down arrows, so the merged document comes out exactly as planned.
Merged on your device
Pages are copied with the pdf-lib library inside your browser; the documents are never uploaded.
Pages kept intact
Text, images, links and vector graphics are copied as they are, without re-rendering or quality loss.
Frequently asked questions
How many files can I merge?
Between 2 and 10 files of up to 50 MB each. Merge in two rounds if you need more.
Is the order important?
Yes, the files are concatenated top to bottom as shown in the list; move them with the arrows before merging.
Are form fields and bookmarks kept?
Page content is preserved; interactive form fields and the outline (bookmarks) of the source files are not carried over.
Encrypted PDFs?
Files with an open password cannot be read; files with only an owner password are merged.