Merge PDF
Combine documents into a single PDF, right in your browser.
How to use this tool
Select at least two PDFs. Check the numbered file list before merging: that is the order used. If your system selects a different order, rename files with 01, 02 and 03 prefixes and select them again.
A worked example
Combine a two-page document and a three-page attachment into one five-page PDF. Pages from the first selected file appear first.
How it works & what to check
Pages are copied into a new document. Password-protected or corrupt PDFs are rejected. Bookmarks, signatures, portfolios and interactive form behavior may not carry over; inspect the downloaded copy.
Common questions
Are my files uploaded?
No. The PDF processing code and libraries run in your browser. Selected document bytes are not sent to Toolzaar.
Can I merge a signed PDF?
Changing a signed document may invalidate its signature. Keep the original and verify any signature requirements before editing.
How large can files be?
This tool limits a batch to 50 MB of input and 500 output pages to reduce browser memory failures. Available device memory still matters.