Acharya Tools

PDF Password Locker

pdf

Add an open password to any PDF so only recipients with the correct password can view it.

Processed locally in your browser. Your PDF and password are never sent to a server.
Offline Ready•Zero Uploads

Drop your PDF here, or browse files

Supports standard PDFs • Processed 100% locally in your browser

Your PDF and password are never uploaded — military-grade AES-256 encryption runs locally using native Web Crypto.

How to Use This Tool

  1. 1Upload any PDF file.
  2. 2Enter and confirm your desired password.
  3. 3Download the password-protected PDF.

Frequently Asked Questions

1 questions answered
pdf-lib applies RC4-128 or AES encryption depending on the PDF version. Resulting files are compatible with Adobe Acrobat and most PDF readers.

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