The pdf merger works like this: it concatenates multiple PDFs into one document in drag-and-drop order, entirely in the browser via pdf-lib. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the PDF Merger
Select or drop your file - it stays on your device.
Choose the operation's options (quality, range, position).
Run the process; large files show progress.
Download the result file.
Features
Files process locally - nothing is uploaded
Download the result with one click
Originals are never modified
Common mistakes to avoid
Renaming extensions instead of converting formats
Uploading confidential documents to unknown sites (never needed here)
Examples
Input
Result
Cover.pdf + Report.pdf + Appendix.pdf
merged.pdf with all pages in sequence
Best used for
Getting a reliable answer for pdf merger without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
Files never leave your device - PDF and archive processing runs entirely in this browser tab.
Frequently asked questions
Are bookmarks and forms preserved?
Page content is preserved exactly; interactive form fields and outline bookmarks from sources may flatten - test before relying on them.
Does the order of the file list matter?
Yes - documents concatenate top to bottom, and you can drag files into the order you want before merging.
Are bookmarks and form fields preserved?
Page content is preserved; interactive form fields from the sources are flattened by the merge - fill them before combining if you need the values.