两个PDF密码解除软件(PDF Password Remover)

1 引言

有时在网上下载的pdf文件做了加密保护, 需要输入密码才能进行编辑和打印. 这对于我们做数据管理来说非常不方便. 下面介绍我一直在使用的两个轻量级的pdf密码解除软件. 

2 Lighten PDF Password Remover

Lighten PDF Password Remover (2.0.0) (31M)是一个轻量级且易于使用的工具，它可以在几秒钟内移除所有文档限制。解除密码后便可以复制、打印或编辑PDF文档. 注意: 没注册的版本只能解除文档的前3页.

(1) Document Restrictions
Also called Owner password or Permission Password. You can open the PDF file and read the contents, but some functions are limited, such as copying, printing. If you open a PDF file with Adobe Reader, you can see (SECURED) in the file name if the file is encrypted by restrictions. Copy and print options are greyed out, you can’t select it. But some of the PDF software may bypass this security.

(2) Open Password
Require correct password to open a PDF file, you can’t get access to PDF content without entering the correct password. All the PDF software can not bypass the Open Password. If you open a PDF file in PDF Reader, it’ll prompt you to enter open password.

(3) Remove Copying, Printing and Editing Restrictions from PDF
Many PDF files are secured by document restrictions. If you have this type of PDF file, you can only view the content, but you may not copy, print or edit the contents. The copy and print options are grayed out. In this case, just add these secured PDF documents to PDF Password Remover, and click 'Start' button, it will remove all the restrictions immediately. So you can reuse the contents more easily.

(4) Remove Open Password from PDF
This app can not crack the open password, but if you know the open password, say you are the owner of an encrypted PDF, or you have the permission, and you don’t want to enter password everytime you want to open this document. This function will save your time.  Simply add PDF file, click on the lock icon in front of the file name, and enter the open password. Click 'Start', PDF Password Remover can remove all the security settings in seconds.

(5) Extremely Easy and Fast way to Unlock PDF
PDF Password Remover is extremely easy to use, the user-friendly interface will guide you from the beginning to the end, you can complete the PDF decryption in 3 steps.

1. Add the encrypted PDF files to the app;
2. Select an output folder to store the unlocked PDF files;
3. Click Start button to start unlocking PDF.

Usually it won't take more than 1 seconds for each PDF unlocking. You can add as many PDF files as you want at one time.

3 PDF Password Remover

PDF Password Remover.7.4.0 (6.5M). 这个软件与上面那个软件类似, 只要把文件拖入到窗口内便可以自动解除密码, 30M的文件几秒钟即可完成.   

There are a lot of PDF files can not be printed or converted, that means those PDF files have been protected. PDF Password Remover is a shareware tool to remove PDF restriction from protected PDF files.

Work Methods:
- Remove Owner Password Protection: Directly
- Remove User Password Protection: User Password Required

What Can I Do After Removing PDF Password
- Copy the Content from PDF
After removing PDF password, you copy the content text from the decrypted PDF and use the text wherever you want.

- Convert the PDF Document to Other Formats

The restricted PDF document can not be converted. After PDF Password Remover processing, the PDF file can be converted and exported to MS Word, Excel, Image and other editable formats by other PDF converters.

- Print the PDF
Before removing the password from the protected PDF, users doesn't have the authority to print the PDF. Once removed the password and restrictions, the PDF file can be printed very well as a normal document.