PDF Password Protector
Secure your sensitive documents with AES-256 encryption. All processing happens locally in your browser – your files never leave your computer.
Select PDF File
Drag & drop your PDF here or click to browse
Supports files up to 100MB • All processing happens locally
PDF Successfully Encrypted!
Your PDF file has been encrypted with military-grade AES-256 encryption. Click below to download the protected version.
💡 Important: Keep your password safe. Without it, the PDF cannot be opened.
Frequently Asked Questions
Yes, this is production-grade security:
1. Client-Side Processing: Your PDF never leaves your browser
2. AES-256 Encryption: Military-grade encryption standard
3. PDF-Lib Library: Industry-standard PDF manipulation library
4. No Server Uploads: All encryption happens locally
When you set a password, the PDF is encrypted using AES-256, the same standard used by banks and governments.
Password recovery is impossible:
• The encryption uses strong hashing (SHA-256)
• We don’t store passwords anywhere
• Without the password, the PDF cannot be decrypted
• This is intentional – it means no one can bypass the security
Always keep a backup of your password!
No, this tool only adds passwords:
• For security reasons, we don’t offer password removal
• To remove a password, you need to know it first
• If you know the password, you can use PDF software to remove it
• We focus on security, not bypassing security measures
Limitations:
• File Size: Up to 100MB (browser memory limit)
• Format: Standard PDF files only
• Encryption: Some advanced PDF features may be simplified
• Browser: Modern browsers only (Chrome 80+, Firefox 75+, Safari 14+)
Very large files may take longer to process depending on your device’s memory.
Encrypting Your PDF
Initializing encryption engine…
Yes! All processing happens locally in your browser. Your PDF file never leaves your computer or gets uploaded to any server.
We use PDF encryption to protect your files. When you set a password, the PDF is encrypted and can only be opened with that password.
No! There's no file size limit. However, very large files may take longer to process depending on your device.
Yes, if you know the password, you can use PDF editing software to remove it or use our PDF tools to manage passwords.