Protect PDF
Lock a PDF behind an open password so it cannot be viewed without it.
把一個 PDF 拖曳到這裡
or 瀏覽你的裝置 · 貼上快捷鍵 Ctrl+V
這個工具一次只能處理一個 PDF。不會上傳任何東西——文件是在記憶體中編輯的。
PDF
關於此工具
Encrypts the file with AES-256 (PDF 2.0). Anyone opening it in Acrobat, Preview or a modern browser will be asked for the password. The encryption runs entirely in this tab — the document is never uploaded.