Protect PDF Online Free
Secure your PDF documents with strong password protection. Set a password that must be entered before anyone can open and view your PDF. Perfect for confidential documents, contracts, and sensitive files.
Drag & drop your files here
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Supports PDF • Max 10 MB per file
How to Protect PDF Online
Upload your PDF
Click the upload area or drag and drop the PDF file that you want to protect with a password.
Set a password
Enter your desired password and confirm it. A password strength meter helps you choose a strong password for maximum security.
Protect and download
Click the Protect PDF button. Download your password-protected PDF that requires the password to open.
About Protect PDF
Protecting sensitive PDF documents with a password is essential for maintaining confidentiality. Whether you are sharing contracts, financial reports, medical records, or personal documents, AuraPDF's Protect PDF tool lets you add strong password protection in seconds.
Simply upload your PDF, set a password, confirm it, and download the protected version. Anyone who tries to open the PDF will need to enter the correct password first. This prevents unauthorized access to your sensitive information.
The built-in password strength meter helps you create a secure password by analyzing length, character variety, and complexity. We recommend passwords that are at least 8 characters long and include a mix of letters, numbers, and special characters.
This tool is ideal for securing legal contracts before sending via email, protecting financial documents and tax returns, safeguarding medical and personal records, adding security to business proposals and confidential reports, and protecting academic papers and research documents.
AuraPDF applies standard PDF encryption that is recognized by all major PDF viewers including Adobe Acrobat, Chrome, Firefox, and mobile PDF readers. The protection is permanent until removed with the correct password.
All processing happens securely in the cloud. Your password is never stored — it is used only during the encryption process. Files are encrypted during transfer with 256-bit TLS and automatically deleted from our servers within 30 minutes. No registration is required, no watermarks are added, and the tool works on any device with a web browser.
