What encryption strength is used for locking?

Standard AES encryption to safeguard your confidential files.

Are my passwords logged or sent anywhere?

No, encryption and decryption are executed exclusively inside your browser.

Yes, completely free with no usage caps.

100% Free & Client-Side

Protect PDFs with strong AES passwords or unlock protected documents for easy access.

100% Secure In-Browser Processing Zero Server Data Retention Unlimited Free Downloads

Supports .pdf up to 40MB

Lock mode: Encrypt PDFs with robust password protection

Unlock mode: Remove owner restrictions and passwords

Zero server transmission ensures your passwords stay confidential

Prevents unauthorized viewing, copying, or printing

Select whether you want to Lock (protect) or Unlock a PDF.

Drop the target document into the tool.

Type your new password or the current password to unlock.

Save the secured or decrypted PDF file.

It can remove standard owner restrictions, but encrypted user passwords require entering the known password.

Combine multiple PDF files into one organized document in any custom order.

Draw, type, or upload your signature and stamp it securely onto any PDF document.

Shrink heavy PDF file sizes for email sharing and web uploads without compromising text readability.

Universal document converter supporting PDF, Word, Excel, PowerPoint, Text, and HTML formats.