Free Protect PDF – Password Protect PDF Online | ToolTree
Password protect your PDF files online for free. Secure your documents before sharing. Client-side PDF protection tool.
Free Protect PDF
Add password protection to your PDF documents before sharing. Upload your PDF, set a password, and download the protected file.
Upload a PDF
Max 15MB
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FAQ
How secure is the protection?
This tool uses 128-bit RC4 encryption standard for PDFs. For extreme top-secret documents needing AES-256, use comprehensive desktop software.
Is my PDF uploaded?
No. All processing and encryption happen solely in your browser. Your file never leaves your device.
What file size is supported?
Up to 15MB PDFs for smooth browser performance.
Is this tool free?
Yes, completely free with no account needed. No watermarks added to your encrypted file.