Protect PDF Online – Encrypt with Password
Secure Confidential Documents with Bank-Grade Encryption
Sharing a PDF via email or WhatsApp can be risky if the content is sensitive. Whether it is a bank statement, a legal contract, or personal ID proof, you should always add a password before sending.
Use ClonyPDF Protect Tool to encrypt your file.
Once locked, the file cannot be opened without the password—even by us.
What Does "Protecting a PDF" Do?
When you protect a PDF using ClonyPDF, we apply AES 128-bit Encryption. This wraps your file in a digital lock.
- Access Control: Users must enter the correct password to view the content.
- Copy Prevention: It prevents unauthorized copying of text (depending on settings).
- Universal Compatibility: The password works on all PDF readers (Adobe, Chrome, Mobile).
When Should You Password Protect a PDF?
- HR & Payroll: Sending salary slips or offer letters to employees.
- Financial Data: Sharing tax returns (ITR), invoices, or bank ledgers.
- Legal: Sending NDAs, agreements, or court documents.
- Personal IDs: Sharing Aadhaar, PAN card, or Passport copies for verification.
If you forget the password you set, the file cannot be recovered. ClonyPDF does not store your password. Make sure you remember it or save it in a password manager.
How to Password Protect a PDF Online
- Go to the Protect PDF Tool.
- Upload the PDF file you want to secure.
- Type your desired password (and confirm it).
- Click "Protect PDF" and download your secured file instantly.
Tips for Creating Strong PDF Passwords
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Key Features of ClonyPDF Security
High Encryption
We use standard encryption protocols that are extremely difficult to crack without the key.
Zero Knowledge
We do not know your password. Only you hold the key to your document.
Auto-Deletion
Your original and protected files are automatically deleted from our servers after 1 hour.
Protect vs. Unlock: What is the difference?
- Protect PDF: Adds a password to an open file. (Use this before sharing).
- Unlock PDF: Removes the password from a locked file (so you don't have to type it every time).
Frequently Asked Questions
Is it free to add a password to a PDF?
Yes. ClonyPDF allows you to encrypt and protect PDF files for free without creating an account.
Can ClonyPDF open my file if I lose the password?
No. The encryption is performed instantly, and we do not store your password. There is no "Master Key" to recover lost passwords.
Does this work on mobile phones?
Yes. The tool works directly in the browser on Android and iPhone. You can password-protect files before sharing them on WhatsApp.