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 ...

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, ...

Because the PDF (Portable Document Format) format is compatible with virtually every major operating system, businesses use it more than any other when they need to ...

PDF is an incredibly popular file format used widely for sharing documents. One of its biggest advantages is the ability to use everything, including fonts, vector graphics, and images, displaying the ...

The widely used PDF format supports data-saving encryption, allowing you to protect sensitive documents so that only those with the correct password can access them. In the old days, you’d need a ...