Protect PDF — Add Password to PDF Online Free

Secure Your PDFs with Password Protection

Need to protect sensitive documents? MyPDF's Protect PDF tool lets you add password encryption to your PDFs, controlling who can open, print, copy, or edit your documents.

How to Password-Protect a PDF

Step 1: Upload Your PDF

Open the Protect PDF tool and upload the PDF you want to secure.

Step 2: Set Permissions

Configure your security settings:

• Open password — Require a password to open the document


• Permissions password — Restrict printing, copying, and editing


• Encryption level — 128-bit or 256-bit AES encryption

Step 3: Download the Protected PDF

Your encrypted PDF is ready. Share the password separately with authorized recipients.

Protection Options

Permission	Description
Open password	Recipients must enter password to view the document
Prevent printing	Disable the print function
Prevent copying	Disable text selection and copy
Prevent editing	Disable form filling and annotations
Allow high-quality printing	Permit printing but at reduced quality

When to Protect PDFs

• Confidential business documents — Financial reports, contracts, internal memos
• Client deliverables — Prevent unauthorized distribution of paid content
• Legal documents — Protect contracts and agreements
• Medical records — HIPAA-compliant document sharing
• Academic materials — Protect exam papers and course materials
• Personal documents — Secure tax returns, ID copies, bank statements

Tips

1. Use strong passwords — Combine uppercase, lowercase, numbers, and symbols
2. Share passwords separately — Never send the password in the same email as the PDF
3. Need to remove protection later? — Use Unlock PDF
4. Protect after merging — Merge your documents first, then protect the combined file

Frequently Asked Questions

What encryption does MyPDF use?

MyPDF supports 128-bit and 256-bit AES encryption, which is the same standard used by governments and financial institutions.

Can recipients still view the PDF without the password?

If you set an open password, no — they must enter the password. If you only set permissions restrictions, they can view but not print/copy/edit.

Is my password stored?

No. MyPDF processes the encryption and deletes all files after 15 minutes. We never store your passwords.

Is it free?

Yes — completely free, no sign-up required.

Related Tools

• Unlock PDF — Remove password protection
• Sign PDF — Add digital signatures
• Redact PDF — Permanently remove sensitive content
• Add Watermark — Add "Confidential" watermarks
• Flatten PDF — Lock form fields and annotations