为PDF文件添加密码保护。使用加密保护您的文档。
Upload the PDF file you want to protect.
Enter a strong password to protect your PDF.
Choose what actions are allowed (print, copy, edit).
Download your password-protected PDF file.
Add password protection and set permissions to secure your PDF documents
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Maximum file size: 100 MB
Your file will be encrypted and secured
256-bit AES encryption protects your PDFs
Control printing, copying, editing, and annotations
Secure documents with strong password authentication
Instant protection without quality loss