Protect PDF with a Password
Lock a PDF with a password using AES-256 encryption and choose whether it can be printed, copied or edited – several files at once, entirely in your browser.
Your PDF and your password never leave this device – the encryption happens right here in your browser.
Drop PDFs here or click to choose
One or many files, any size – no limits, no sign-up.
Choose the PDFs to lock, then set the password that will be needed to open them.
Add a password to a PDF without uploading it anywhere. gizke.com encrypts the file with AES-256 – the strongest encryption the PDF standard offers – right in your browser, using qpdf compiled to WebAssembly. Optionally restrict printing, copying and editing with a separate permissions password. Protect as many files as you like in one go: there are no limits, watermarks or sign-ups.