PDF 密码
直接在浏览器中处理文件，无需注册。
Drop PDFs here or choose files
Protect sensitive files: how to password-protect and encrypt a PDF
PDF password protection asks for a password before the document can be opened. It is useful for sharing internal documents, quotes, applications, and other files you do not want opened freely. FilePat lets you choose PDFs in your browser, set a password, and save the encrypted files. Multiple files can be processed together. Removal is intended for PDFs you are authorized to unlock using the current password.
Security considerations
When a PDF is processed in the browser, it does not need to be uploaded to an external conversion server. Your device security, browser extensions, and sharing destination still matter. Use a strong password and handle the saved output carefully.
Frequently asked questions about PDF passwords
Can I password-protect multiple PDFs at once?
Yes. Add multiple PDFs to the queue and process them together.
Can I unlock a PDF if I forgot the password?
The tool is for PDFs you are authorized to access when you have the current password. It does not guess or bypass passwords.
Can I use it on a smartphone?
Yes. File selection and password entry are designed to work on smartphones.