A PDF file may be encrypted for security, or digitally signed for authentication.

The standard security provided by Acrobat PDF consists of two different methods and two different passwords, user password, which encrypts the file and prevents opening, and owner password, which specifies operations that should be restricted even when the document is decrypted, which can include: printing, copying text and graphics out of the document, modifying the document, or adding or modifying text notes and AcroForm fields.

The user password encrypts the file and requires password cracking to defeat, with difficulty depending on password strength and encryption method. The owner password does not encrypt the file, and instead relies on client software to respect these restrictions, and is not secure. An "owner password" can be removed by many commonly available "PDF cracking" software, including some free online services. Thus, the use restrictions that a document author places on a PDF document are not secure, and cannot be assured once the file is distributed; this warning is displayed when applying such restrictions using Adobe Acrobat software to create or edit PDF files.

You can Remove PDF restrictions by our online program, PDFConvert desktop software or command line program.

Use this form to remove PDF user password, owner password and all restrictions.

1. Click the "Choose File" button (different web browsers may have different button names such as "browse..."), a browse window will open, select a local Adobe PDF file and click the "Open" button.
2. Enter PDF owner password if the PDF file is protected by owner password. Enter PDF user password if the PDF file doesn't have an owner password.
3. You can download or view the PDF file on your web browser when the task is completed.

After installing PDFConvert software, click Start - Programs - PDFConvert - PDFConvert to run.

Click the "PDF Tools" Toolbar, Click the "Encrypt / Decrypt PDF" button on the left, click the "Add Files" button. Browse windows will be opened, choose local PDF files (*.pdf) and click Open.

Select "Decrypt File" option if you want to remove passwords and restrictions from PDF files. Select "Encrypt File" option if you want to add passwords and restrictions to PDF files.

Click on Convert button. PDFConvert will remove user password, owner password and all the restrictions from the PDF files you selected and open the target folder after task is completed.

The PDF restrictions remover command line program is not available yet. Please check back later.