Password Protect PDF

Encrypt any PDF with a password. Only people who know the password can open the file. 100% browser-based. build v3

Drop your file here

or click to browse from your device

PDF

Features

AES-256 Encryption

Encrypts your PDF with AES-256 so it cannot be opened without your password.

Private

Password never sent to a server. All encryption happens in-browser.

Strength Indicator

Visual strength meter guides you to choose a secure password.

Instant Download

Protected PDF downloads to your device immediately.

How It Works

Upload PDF

Drop your PDF file.

Set Password

Enter a strong password and confirm your choice.

Download

Your encrypted PDF is ready to download.

Frequently Asked Questions

How secure is the encryption?+

Your PDF is encrypted with AES-256 using QPDF, the same engine used by professional PDF tooling — compatible with Adobe Acrobat and all major PDF viewers.

Can I remove the password later?+

Yes — use our Unlock PDF tool with the same password to remove protection.

Is my password stored anywhere?+

Never. Your password and file are processed entirely in JavaScript in your browser and never transmitted anywhere.

What if I forget my password?+

There is no recovery option. Make sure to keep your password in a safe place before locking the PDF.