Use our free PDF Security tool to protect PDF files with passwords and encryption. Restrict access, prevent copying or printing, and secure your confidential data — all online, without installing any software.
PDF Security – Protect & Encrypt PDF Files Online
Use our free PDF Security tool to protect PDF files with passwords and encryption. Restrict access, prevent copying or printing, and secure your confidential data — all online, without installing any software.
What Is a PDF Security Tool?
The PDF Security tool lets you encrypt and lock PDF files using a password. You can control who can open, print, copy, or edit your documents — keeping sensitive information safe, private, and professional.
How to Secure a PDF File
- Click “Choose File” to upload your PDF document.
- Enter an open password and optional owner password.
- Select restrictions such as disable editing or printing.
- Click “Encrypt PDF” to apply security settings and download your protected file.
Example Use Cases
| Purpose | Input File | Protection Type | Output File |
|---|---|---|---|
| Secure invoices | Invoices.pdf | Password lock | Invoices_Protected.pdf |
| Confidential reports | Report.pdf | Encrypt + restrict printing | Report_Secure.pdf |
| Private contracts | Contract.pdf | Owner password only | Contract_Locked.pdf |
| University documents | Result.pdf | Disable copying | Result_Secure.pdf |
Key Features of the PDF Security Tool
- 🔒 Add 256-bit AES encryption to your PDFs.
- 🔑 Set open and owner passwords separately.
- 📄 Restrict editing, copying, or printing permissions.
- 💻 Works 100% online — no installation or registration needed.
- 🧾 Compatible with all devices and browsers.
Benefits of Securing Your PDF Files
- ✅ Keep sensitive information private and secure.
- ✅ Prevent unauthorized editing and tampering.
- ✅ Maintain control over file access and permissions.
- ✅ Ensure compliance with data protection standards.
Tips for Best Results
- Use strong passwords with letters, numbers, and symbols.
- Never share your encryption password publicly.
- Keep a backup copy before applying restrictions.
- Remove security later using the Unlock PDF Tool.
Frequently Asked Questions (FAQ)
1. What’s the difference between open and owner passwords?
The open password restricts file access, while the owner password controls editing, printing, and copying permissions.
2. Can I remove security later?
Yes — use the Unlock PDF Tool if you know the password.
3. Is this tool safe for confidential documents?
Absolutely. All uploads are encrypted and automatically deleted after processing.
4. Does it work on mobile?
Yes — secure your PDFs from any device, including Android and iPhone.
5. What encryption standard does it use?
This tool applies 256-bit AES encryption, the same level used in enterprise-grade security systems.
Final Thoughts
The PDF Security tool helps you lock, encrypt, and protect PDF files quickly. Add passwords, set permissions, and safeguard your confidential documents — free, fast, and easy.
Useful Links:
Unlock PDF Tool |
Add Watermark Tool |
Edit PDF Tool |
PDF Editor |
Compress PDF Tool |
Convert to PDF Tool |
WHO – Digital Data Privacy
