Encrypt PDF — Password Protect PDF Free, No Upload
Add strong AES-256 password protection to any PDF document — free, with no file upload to any server. Set a user password to control who can open the document, and an owner password to restrict editing, printing, and copying.
Drop a PDF file here or click to select
Encrypting...
Frequently asked questions
Everything runs entirely in your browser using WebAssembly. Your files never leave your device — no upload, no server, no cloud.
No artificial limit. Processing capacity depends only on your device's available memory. Desktop browsers typically handle files up to 500 MB.
Never. ILikePdf does not add watermarks to any output file, free or otherwise.
Yes. The tool works in any modern mobile browser (Chrome, Safari, Firefox) on Android and iPhone with no app installation.
Yes. Use the Remove Password tool to decrypt a PDF as long as you know the owner password.