Password Protect PDF Online Free

Secure your confidential PDF documents with a password to prevent unauthorized access. Our free PDF password protection tool lets you add AES-256 encryption to any PDF in seconds. Protect sensitive business documents, financial records, personal files, and confidential contracts from unauthorized viewing. No Adobe needed, no signup required, completely free.

Drag & drop your PDF or browse

100% PrivateFiles stay in browser
InstantClient-side processing
No Sign-upFree & unlimited

How to Protect PDF

  1. 1

    Upload the PDF you want to password protect.

  2. 2

    Enter your desired password in the password field.

  3. 3

    Confirm the password by entering it a second time.

  4. 4

    Click "Protect PDF" to apply AES-256 encryption.

  5. 5

    Download your password-protected PDF, now secured from unauthorized access.

Key Features

AES-256 Encryption – Industry-standard encryption that secures your document completely.
Custom Password – Set any password of your choice to protect your PDF file.
Instant Protection – Password protection is applied in seconds without any delay.
No Adobe Required – Protect PDFs entirely in your browser without any software.
No Watermark Added – Your protected PDF remains completely clean with no branding.
No Signup Needed – Free PDF password protection with immediate download.

Frequently Asked Questions