About the PDF Merger
This PDF merger combines several PDF files into a single document, preserving each file's pages exactly as they were, in the order you add the files. It works by reading each PDF's internal page structure and copying it into a new document using a JavaScript library running in your browser, so the files themselves are never uploaded anywhere.
How to use the PDF Merger
- 1
Click the upload area and choose two or more PDF files, or drag them in together.
- 2
Check the file list — remove and re-add a file if you need to change where it sits in the order.
- 3
Review the page count shown once the merge completes.
- 4
Download the combined PDF.
What people use it for
Combining scanned documents
Merge several single-page scans, each saved as its own PDF, into one document ready to send or file.
Assembling a report from separate sections
Combine a cover page, several chapter PDFs and an appendix, each perhaps produced by a different tool, into one final document.
Merging signed pages back into a contract
Bring a signature page, scanned and saved separately, back together with the rest of a contract into a single file for filing.
How merging preserves the original pages exactly
A PDF is not a flat image; it is a structured document where each page is a distinct object referencing its own content, fonts and images. Merging works by reading that structure from each source file and copying the page objects directly into a new document, rather than rendering pages to images and reassembling them. This is why text stays selectable, fonts stay embedded, and image quality is completely unaffected — nothing is redrawn or recompressed in the process, only reorganised.
Why the file order matters and how to control it
The merged document follows the exact order the source files were added in, top to bottom in the file list, since there is no independent step to reorder pages afterwards. If a file ends up in the wrong position, removing it and re-adding it moves it to the end of the queue, which is the simplest way to fix ordering before the merge runs. For more complex reordering within a single document rather than across several files, extracting specific pages with a PDF splitter first, in the order you want them, achieves the same result.
Tips
- Merge files in the exact order you want them to appear — there's no separate reorder step afterwards.
- Very large scanned PDFs merge more slowly since every page's content is copied in full; expect a short pause for dozens of pages.
- If a file won't merge, it's most often because it's password-protected — unlock it in a PDF reader first.