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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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使用步骤
1
选择文件
拖放文件或点击浏览选择。
2
本地处理
你的浏览器使用 JavaScript 在本地处理文件，无需上传。
3
下载结果
即时下载处理完成的文件。原始文件保持不变。
常见问题
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.