🔐 Protect PDF with Password
Add a password to your PDF using AES-128 encryption. The file will require the password to open — 100% offline, no uploads.
Click to Browse or Drag & Drop a PDF
Max 100MB | No upload, completely local📖 How to Password Protect a PDF – Step by Step
- Step 1: Upload the PDF you want to protect (up to 100MB).
- Step 2: Enter a strong password (the file will ask for this password when opened).
- Step 3: Confirm the password — the tool checks strength and matching.
- Step 4: Click “Encrypt PDF” — the AES-128 encryption runs locally in your browser.
- Step 5: Download the protected PDF. Only people with the password can open it.
💡 Security & Privacy
- ✔️ 128-bit AES encryption (industry standard for PDF protection).
- ✔️ 100% client‑side – your file never leaves your device.
- ✔️ The password is never transmitted anywhere — you set it locally.
- ✔️ No registration, no upload, no hidden fees.
📢 Share this PDF password protection tool with colleagues – it's free and private!
Note: The protected PDF will work in Adobe Acrobat, Chrome's PDF viewer, and most modern PDF readers. If you lose the password, the file cannot be recovered.
🔒 100% client‑side • Your PDF never uploaded • AES-128 encryption • Zero tracking