About merging PDF files
Merging PDFs means stitching several documents into one file, with the pages in the order you choose. It is one of those small tasks that comes up constantly: combining a cover letter and a resume, assembling scanned pages into a single record, or joining chapters into one book. This tool does it right in your browser, so the documents are never uploaded to a server, which matters when they hold personal or confidential information.
How to use it
Add the PDFs in the order you want them to appear. The first file you add becomes the first section of the merged document, and so on. Once you have at least two files, the merge button appears. The tool reads each PDF, copies all of its pages into a new document, and hands you back a single file to download.
Because everything runs locally, the speed depends on your device and the size of the files, not on your connection. Large scanned PDFs take a moment; text-based ones are nearly instant.
What is kept and what is not
The pages themselves are copied faithfully: text stays selectable, images stay sharp, and the layout is untouched. What does not carry over is document-level extras that only make sense for a single file, such as the original bookmarks or form-field values from each source. If you need those preserved, a desktop PDF editor is the safer choice. For the common job of putting several documents in one file, this tool is the quick path.
A note on file size
A merged PDF is roughly the sum of its parts, so combining several large files gives you a large file. Merging does not compress anything. If the result is too big to email or upload, that is a separate step: reduce the size after merging, ideally by shrinking the images inside the source documents before you combine them.