Merge PDF
Combine two or more PDF files into a single document. Add your files, drag them into the order you want, and download one merged PDF — text, images, and formatting all come through untouched. Everything runs in your browser using pdf-lib, so your files are never uploaded anywhere.
- Free — no sign-up
- Private — runs in your browser
- Instant results
How to use the Merge PDF
- 1Add your PDFs. Select or drop two or more PDF files.
- 2Set the order. Use the up/down arrows to arrange them the way you want the final file to read.
- 3Download the merged PDF. Get one combined file with every page in the order you chose.
Frequently asked questions
Is there a limit to how many PDFs I can merge?
No fixed limit — the tool works entirely in your browser's memory, so very large batches of very large files may be limited by your device rather than the tool itself.
Does merging reduce quality?
No. Pages are copied directly from each source file into the new document, so text, images, and formatting stay exactly as they were.
Are my files uploaded anywhere?
No. Merging happens entirely in your browser, so your PDFs never leave your device.
Learn more
Why merging beats sending separate attachments, how PDF merging works, and a step-by-step workflow for combining files without losing quality.
The difference between extracting page ranges and splitting every page apart, how to write a page range, and what stays unchanged.
When to reorder or delete pages instead of splitting or merging, and how to do it with a drag-and-drop thumbnail workflow.
Text vs. image watermarks, how to get the opacity and position right, and a step-by-step workflow for stamping a PDF.
How to combine photos or scans into a single PDF, choose the right page size and orientation, and keep full image quality.