Are you trying to open a password-protected PDF or ZIP file? Then, you already know how frustrating it can be. You try out different tools, and the result is a ...

内容：「Unlock-PDF」は、PDFファイルの印刷およびコピー制限を、オンラインで解除できるサービスだ。パスワードを入力することなくこれらの制限を解除できるので、うっかり自分が設定したパスワードがわからなくなった場合に、これらの操作を可能にする ...

The Adobe PDF format allows businesses to create documents from virtually any application and share them whether the recipient has the program that created the file or not. If you have PDFs you ...

A recommended approach to secure your most private documents — whether it’s a PDF, Word file, or Excel spreadsheet — is to lock them with a passcode. While this does help keep sensitive content safe, ...