Protect PDF with Password — PDF Encryption
Add password encryption to secure your PDF documents.
Encrypt your PDF documents with password security. Set a custom password to restrict unauthorized viewing and specify permission controls for printing, content copying, and document modification.
Confidential Payroll
Protect salary slips and financial disclosures before sending via email.
Proprietary Data
Secure commercial proposals and intellectual property with user access passwords.
Personal Records
Add password protection to tax filings, medical reports, and identity scans.
How to password protect a PDF online
Upload PDF
Select the PDF file you wish to encrypt.
Enter password
Type and confirm your chosen password.
Set permissions
Configure optional print, copy, and edit restriction flags.
Download protected PDF
Click Protect PDF to encrypt your file and download the secure document.
Frequently Asked Questions about Protect PDF
What happens if I forget my password?
HeyPDF does not store user passwords or document decryption keys. Be sure to record your password securely, as encrypted files cannot be opened without it.
Can recipients open the file without special software?
Yes. Standard PDF readers (including Adobe Acrobat, Apple Preview, Chrome, and Edge) support standard password-protected PDFs.
Is the protection tool free?
Yes. Encrypting PDF documents is free with no subscription required.
Are passwords transmitted securely?
All communications use HTTPS encryption in transit. Files are processed temporarily and are automatically cleaned up after processing.