PDF Password Adder
Add password. pdf-lib doesn't support encryption directly — use qpdf.
About this tool
PDF Password Adder is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Tools — Files & Productivity. Browse more Tools — Files & Productivity tools.