Merge pages in file order while preserving shared resources
Merge accepts up to 20 PDFs; every other tool accepts one PDF. Each PDF is limited to 50 MiB, inputs are limited to 200 pages, generated downloads are limited to 100 MiB, and each run has a 60-second cancel/timeout boundary. Password-protected PDFs are rejected; these tools do not remove passwords. The result is one merged PDF; source files are not uploaded or written to browser storage.