Protect & Unlock PDF
Add password protection to secure your PDFs or remove passwords from encrypted documents. All processing happens securely in your browser.
How to Protect or Unlock PDFs
Protect Mode (Add Password)
- 1. Upload your PDF file
- 2. Select "Protect" mode
- 3. Enter user password (required to open PDF)
- 4. Optionally add owner password and set permissions
- 5. Download your protected PDF
Unlock Mode (Remove Password)
- 1. Upload your encrypted PDF file
- 2. Select "Unlock" mode
- 3. Enter the password to unlock the PDF
- 4. Download your unlocked PDF without password protection
Understanding PDF Security
🔐 User Password
The user password is required to open and view the PDF. Without this password, the PDF cannot be opened in any PDF reader. This provides strong protection for confidential documents.
🔑 Owner Password
The owner password controls document permissions. Users with just the user password have restricted access based on your permission settings. The owner can change security settings and has full access.
⚙️ Permissions
Control what users can do with your PDF: allow or deny printing, copying text/images, modifying the document, and adding annotations. These restrictions only apply to users who open with the user password.
Features
- Add password protection to any PDF
- Remove password from encrypted PDFs
- Set user and owner passwords
- Control printing, copying, and modifying permissions
- 100% client-side - files never leave your device
- No file size limits up to 100MB
- Industry-standard AES encryption
- Works on all devices and browsers
Frequently Asked Questions
Is password-protecting PDFs really secure?
Yes. PDF password protection uses industry-standard AES encryption. A strong password makes it virtually impossible for unauthorized users to access your document.
Are my files uploaded to your servers?
No. All encryption and decryption happens directly in your web browser using JavaScript. Your PDF never leaves your device, ensuring complete privacy.
What's the difference between user and owner passwords?
The user password is required to open the PDF. The owner password allows full access and can modify security settings. You can set just a user password, or both passwords for layered security.
Can I remove password protection if I forgot the password?
No. Without the correct password, encrypted PDFs cannot be unlocked. PDF encryption is designed to be secure, which means there's no "master key" or backdoor. Always keep a backup of important passwords.
What permissions can I control?
You can allow or deny: printing (high-quality), copying text and images, modifying the document, and adding annotations/comments. These restrictions apply to users who open with the user password.
Will password protection work in all PDF readers?
Yes. PDF password protection is a standard feature supported by all major PDF readers including Adobe Acrobat, Preview (Mac), and web browsers with built-in PDF viewers.
Can I protect PDFs with just an owner password?
Yes. If you only set an owner password, the PDF can be opened without a password, but users will have restricted permissions based on your settings (like no printing or copying).
How strong should my password be?
Use at least 12 characters with a mix of uppercase, lowercase, numbers, and symbols. Avoid common words or personal information. The stronger your password, the more secure your PDF.
Your Privacy is Protected
This PDF security tool processes everything in your browser using JavaScript. No files are uploaded to any server, and we don't store or have access to your documents or passwords. Your PDFs and passwords remain completely private and secure.