Below we show how to encrypt a PDF file with a password and how to apply PDF restrictions.

1. 上傳您的文件

   文件通過加密連接安全上傳. 文件保持安全. 處理後，它們將被永久刪除.

   不想上傳您的文件並離線處理它們？
   Try Sejda Desktop. 與在線服務功能相同，且文件永遠不會離開您的計算機.

   點擊“上傳”並從您的本地計算機選擇文件.

   將文件拖放到頁面上也有效.

   Dropbox 或 Google Drive 文件

   您也可以從 Dropbox 或 Google Drive 中選取 PDF 文件.

   展開“上傳”下拉菜單並選擇您的文件.

2. Choose a strong password

   When opening the document, users will be asked to provide this password. Make sure it's a strong password, recommended 16 characters or more.

   Optionally, choose an owner password as well

   This is the password that users will be asked when attempting to make changes to the document, after the document is already opened.

3. Select optional PDF restrictions

   Choose what PDF features should be allowed. For example printing can be restricted, or filling forms and commenting can be disabled

   Depending on the software used for opening the PDF file, these permissions may or may not be enforced.

4. Save your changes

   Click Encrypt PDF and then Download your protected PDF.