Combine related documents
Join several PDF files into one packet for review, delivery or archiving.
PDF
Drop PDF files herePDF · up to 30 filesAbout Merge PDF
Merge PDF combines multiple PDF documents into one file in the exact order you choose. Add your PDFs, drag them into position, review the total page count and create one combined document.
Common use cases
Assemble reports
Place cover pages, appendices and exported sections into a single ordered document.
Simplify sharing
Replace multiple attachments with one PDF when recipients need the files in a fixed sequence.
How it works
1
You select multiple PDF files and arrange them in the intended order.
2
The browser copies pages from each source document into a new PDF structure.
3
The combined PDF is generated as a separate file while the original documents remain unchanged.
Privacy & file handling
PDF merging is performed locally
The supported merge workflow reads and combines PDF pages in the browser rather than requiring the source documents to be uploaded to Zavilo.
Limitations and important notes
- Interactive forms, bookmarks, embedded files or unusual PDF structures may not be preserved exactly when documents are rebuilt.
- Merging does not reduce file size by itself.
- Encrypted PDFs may need to be unlocked before they can be merged.
Merge PDF vs Images to PDF
| Feature | Input | Use when |
|---|---|---|
| Merge PDF | Existing PDF documents | You want to preserve and join PDF pages |
| Images to PDF | JPG, PNG or WebP images | You want to create PDF pages from image files |
How to use Merge PDF
- 1
Choose two or more PDF files.
- 2
Drag the files into the order you want them to appear in the merged document.
- 3
Review the number of files, total pages and combined file size.
- 4
Click Merge PDFs to create one PDF in the selected order.
- 5
Download the finished merged PDF.
Tips for better results
- Put the files in final reading order before merging.
- Use the page counts shown beside each file to confirm that the correct documents were added.
- Password-protected PDFs need to be unlocked before they can be merged.
Frequently asked questions
How many PDF files can I merge at once?
You can add up to 30 PDF files in one merge.
Can I change the PDF order before merging?
Yes. Drag the files into a new order or use the up and down controls before creating the merged PDF.
Can I merge password-protected PDFs?
Password-protected PDFs are not supported by this merge tool. Unlock the PDF first and then add it again.