How to Password-Protect & Encrypt PDFs Free — No Adobe

When to Password-Protect PDFs

Sending financial statements, contracts, medical records, or client proposals via email? Anyone who intercepts the email can open the attachment. Password protection adds a layer of security — the recipient needs the password to open the file. For extra sensitive documents, encryption ensures the content is unreadable without the key.

How to Protect a PDF

1. Open the Protect PDF tool
2. Upload your PDF
3. Set a password (share it separately via text or phone — never in the same email)
4. Choose permissions: allow/restrict printing, copying text, editing
5. Download the protected PDF

Your PDF is encrypted in your browser. The unprotected version never leaves your device.

Types of PDF Protection

• Open password — required to open the PDF at all. Maximum security for the content.
• Permissions password — PDF opens freely but restricts actions: no printing, no copying text, no editing. Good for distributing read-only documents.
• Both — require a password to open AND restrict what the reader can do. Maximum control.

Complete Secure Document Workflow

1. Sanitize metadata — remove author name, software info, hidden data
2. Flatten the PDF — lock form fields and annotations
3. Add watermark — mark as CONFIDENTIAL if needed
4. Protect with password — encrypt the document
5. Send via email, share the password via a different channel (text message, phone call)