Protect PDF with Password
Encrypt your PDF with a secure password to prevent unauthorized viewing. 100% private in-browser encryption.
Select PDF file
Choose a PDF document to password-protect
How to Password Protect & Encrypt Your PDF Files
Safeguard tax forms, financial statements, and confidential client data with standard AES encryption directly in your browser.
1. Select PDF File
Choose the confidential PDF document you want to secure from unauthorized access.
2. Set Password
Enter a strong password. Our client-side engine generates standard cryptographic encryption keys.
3. Download Encrypted PDF
Save your password-protected PDF. Recipients will be required to enter the password to view or print.
Frequently Asked Questions
Everything you need to know about security, formatting standards, and zero server upload privacy.
01. What encryption standard is applied to the PDF? ▼
Zenith uses industry-standard AES encryption compatible with Adobe Acrobat, Apple Preview, Google Chrome, and all standard PDF readers.
02. Can Zenith or any third party view my password? ▼
No. The encryption key derivation happens entirely within your web browser. Zenith has zero access to your files or passwords.
03. Can a protected PDF be opened without the password? ▼
No. Standard PDF encryption enforces strong cryptographic protection, ensuring only authorized password holders can view the contents.
04. Can I protect multiple sensitive files in a row? ▼
Yes, you can encrypt as many documents as needed with no usage caps or subscriptions.
05. Is this tool safe for medical (HIPAA) or legal documents? ▼
Yes, because files never leave your browser, your documents remain fully isolated from external network eavesdropping.