🔐 Free PDF Tool

Password Protect PDF — Free Online Encryption

Add a password to your PDF to restrict access. Files are encrypted locally in your browser — never uploaded.

🔒 Files never leave your browser — 100% private

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Drop your PDF here

Upload the PDF to protect with a password

📂 Choose PDF

✅ PDF is now password protected!

⚠️ Remember your password — there is no way to recover it.

How it works

Drop or select the PDF to protect.

Enter and confirm your chosen password.

Click Protect PDF and download the encrypted file.

✓ AES encryption — PDF-standard encryption applied locally in your browser.

✓ Permission control — Choose read-only, no-print, or full access restrictions.

✓ Zero upload — Encryption happens on your device — file never sent to any server.

✓ Instant — No waiting — password applied in seconds.

PDF passwords use AES-128 or AES-256 encryption. A strong password (12+ characters, mixed) is practically uncrackable.

There is no recovery option. Write down your password before encrypting.

Yes. The encryption follows the standard PDF specification and is compatible with Adobe Acrobat, browsers, and all standard PDF viewers.

Yes — use a PDF editor or our Remove Password tool (coming soon) by providing the original password.