Encrypt your PDF files with standard password security to prevent unauthorized access.
Lock and secure your confidential documents in 3 simple steps.
Select or drag & drop the PDF you wish to encrypt into the tool above.
Choose a secure password and review restriction settings.
The file is encrypted in browser memory and saved to your device immediately.
Unlike traditional cloud encryption, your private documents and passwords never travel across the internet.
Compatible with Adobe Acrobat Reader, Google Chrome, Safari, and all standard PDF readers worldwide.
Encrypt large documents in fractions of a second without waiting for network upload queues.
Lock files securely from your desktop, iPhone, Android, or tablet without installing third-party software.
Our tool applies standard RC4 128-bit encryption directly inside your web browser using WebAssembly. The password hashes and security handlers are embedded locally into the PDF binary stream before downloading, ensuring your files are never transmitted across the network.
No. The document is protected with standard PDF user encryption. Standard PDF viewers (such as Adobe Acrobat Reader, Apple Preview, and modern web browsers) will require entering the correct password before granting access to view the pages.
Never. Because the entire encryption operation executes locally in your device memory (RAM), your password and document are completely invisible to our servers and any third party.
Yes. In addition to locking document access with your user password, the encrypted document restricts unauthorized editing, copying of text, and modifying pages.
Because our system is strictly zero-knowledge and operates purely client-side, we do not store recovery keys or passwords. If you lose the password, there is no way to retrieve it, so be sure to keep a copy of your original file.
Yes. You can encrypt documents directly on iPhone, iPad, and Android smartphones using Safari, Chrome, or any modern mobile browser without downloading any apps.