Protect PDF
Use Protect PDF online for free. Your files and data stay in your browser.
⚠ 重要限制说明
浏览器端使用的 pdf-lib 库 不支持原生的 PDF 加密，因此本工具无法在前端真正生成带密码保护的 PDF 文件。若需要实现加密，请使用：
- 本地软件：Adobe Acrobat、Foxit、WPS
- 命令行工具：
qpdf --encrypt - 服务端：iText、PyPDF2 等支持加密的库
Click or drag files here to upload
SUPPORTED: application/pdf,.pdf
How to use
- 1 Open Protect PDF and provide the required input.
- 2 Adjust the available options to match your needs.
- 3 Review the result and download or copy it when ready.
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About this tool
Protect PDF is a free browser-based tool from ToolboxAgent. It runs without installation and processes your data locally whenever the underlying browser technology permits it.
Use Protect PDF when you need a quick, private way to complete this task without creating an account or uploading files to a third-party service.
Frequently asked questions
Is Protect PDF free to use? +
Yes. Protect PDF is available in your browser without registration. Processing takes place locally whenever the tool supports it.