Protect PDF - Protect your PDF documents online

Password protect a PDF with an easy online tool. Protect sensitive content with trusted PDF encryption.

Encrypt PDF with open password and copying, printing permission. It's a free, secure and easy way to protect your PDF.

PDFEncrypt is a free, open-source native Windows app that allows you to password protect (encrypt) PDF files for free, without purchasing expensive software ...

2023年12月18日 — Another website that will password protect a PDF is CleverPDF, which offers a wide variety of tools. At the website, click the Encrypt PDF icon.

Open the PDF and choose Tools > Protection > Encrypt > Encrypt with Password ... • Acrobat 7.0 And Later (PDF 1.6) encrypts the document using the AES encryption.

No file size limits, no ad watermarks - A simple and secure web app to encrypt your PDF files with strong AES 128-bit encryption for free.

Using PDF2Go to protect a PDF file by adding a password to your delicate documents is easy and completely for free. But there is more! You are not restricted to ...

Encrypt and protect PDF with a password to safeguard sensitive information. Secure your PDF files online, with ease and without registration.

2023年11月8日 — From the Protect a PDF toolset in the left pane, select Encrypt with password. Select File > Protect Using Password. In the Advanced Options ...

設置一個密碼來保護PDF文檔中的敏感資訊。輕鬆地線上保護你的PDF文檔，且無需註冊。