Protect PDF with Password
Add password protection to your PDF file. Set a password to encrypt the document.
Files are processed locally — nothing leaves your browser.
Drop your PDF here, or click to browse
PDF files only • Maximum 200MB • Add AES-256 encryption protection
Processed locally — your file never leaves your browser
How to protect pdf with password
Upload PDF
Select a PDF file from your device
Set secure password
Create a strong password that meets our security requirements for AES-256 encryption
Download
Save the password-protected PDF with military-grade encryption
Built for privacy, speed, and simplicity
Unlike other PDF tools, DocMint processes everything in your browser. Your files never touch a server.
100% Private
Your files never leave your computer. Zero servers, zero privacy risk.
Instantly Fast
No uploads, no queues, no waiting. Files processed immediately in your browser.
Enterprise Ready
GDPR compliant, WCAG accessible, and built with professional-grade security standards.
Frequently Asked Questions
What encryption is used?
AES-256 encryption — the same military-grade standard used by banks and government agencies. However, the security depends on your password strength.
Why are there password requirements?
Weak passwords like '123456' can be cracked in seconds, making AES-256 encryption useless. Our requirements ensure your documents stay truly protected.
Can I remove the password later?
Yes — use our Unlock PDF tool to remove the password if you know it.
Are my files secure?
Yes — files never leave your device. All processing happens locally in your browser using client-side encryption.
Is my password stored anywhere?
Absolutely not. Your password is used only to encrypt the PDF in your browser and is never stored, transmitted, or logged anywhere.
Will the protected PDF work in all PDF readers?
Yes. The encrypted PDF uses standard PDF encryption that is compatible with all major PDF readers including Adobe Acrobat, Preview, and Chrome's built-in viewer.
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