PDF Merge

Frequently asked questions

Does merging PDFs reduce quality?

No. Merging copies the original pages byte-for-byte into the new file, so text stays selectable and images stay at their original resolution.

Why is the merged PDF larger than the sum of the inputs?

Each source PDF carries its own fonts and metadata, and duplicates aren't always deduplicated when combined. Running the result through a PDF optimizer afterward usually trims the overhead.

Can I merge password-protected PDFs?

Encrypted PDFs need to be unlocked first, since their page streams can't be read while protected. Remove the password in your PDF reader, merge, then re-apply protection if needed.