In your browser (Windows, Mac, Linux, phones)
- Open Merge PDF.
- Drop in the PDFs. Put them in order with the arrows.
- Click Merge and download the combined file.
The files are combined on your own device and never uploaded, which matters for contracts, statements and other private documents.
On a Mac: Preview
- Open the first PDF in Preview and choose View → Thumbnails.
- Drag the other PDFs from Finder into the thumbnail sidebar, where you want them to go.
- Choose File → Export as PDF to save the combined file.
On Windows
Windows has no built-in way to combine PDF files. Use a browser tool like the one above, or a PDF editor.
Reorder or remove pages afterwards
Organize PDF shows every page as a thumbnail so you can drag pages into order, rotate them or delete them before saving.
Common problems
- A file will not open, or merges as blank pages. It is probably protected with a password. Remove it first with Unlock PDF (you need to know the password), then merge.
- The pages are in the wrong order. Files are joined from the top of the list to the bottom. Check the list before you click Merge, and fix single pages afterwards with Organize PDF.
- The result is too large to email. Run it through Compress PDF. Scans and photos shrink the most.
- Pages have different sizes. Merging keeps every page at its own size, so an A4 page can follow a Letter page. Printers fit each page to the paper.
What merging keeps
Pages are copied into the new file rather than redrawn, so text stays selectable and searchable and images keep their quality. Bookmarks, fillable form fields and digital signatures may not carry over. A digital signature covers the exact bytes of the signed file, so it never validates in a merged copy; send signed documents as separate files.