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Protect PDF
Add password protection to your PDF files using AES encryption. Set user password (to open) and owner password (for permissions). Control printing, copying, and modification permissions. All encryption happens locally.
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How It Works
1
Select Files
Drag & drop your files or click to browse.
2
Process Locally
Your browser processes the files using client-side JavaScript. Nothing is uploaded.
3
Download Result
Get your processed file instantly. Your original files remain unchanged.
Frequently Asked Questions
Is Protect PDF free to use?
Yes! Protect PDF is completely free. No sign-up, no limits, no watermarks. All processing happens locally in your browser.
Do my files leave my device?
No. All PDFlikes tools process files entirely in your browser. Nothing is ever uploaded to any server.