Password Protect PDF file

Password protect PDF files

Add PDF password protection with Adobe Acrobat’s online tool. It means a password is always needed to view the contents of your PDF file.

Restrict unauthorized access

Restrict unauthorized access

When you password protect a PDF, you control file access. We’ll let you know if your password is weak, medium, or strong.

Password security

PDF password security you can trust

As the inventor of the PDF file format, Adobe delivers trusted document security. Password protect your PDF with confidence from any browser on Mac or Windows.

Password Protect PDF

How to password protect a PDF

How to password protect a PDF

Follow these easy steps to create a PDF password:

Click the Select a file button above or drag and drop a PDF into the drop zone.

Enter a password, then retype it to confirm the password.

Click Set password.

Sign in to download or share your protected PDF.

How do I choose a strong PDF password?

How do I choose a strong PDF password?

To create a strong PDF password, increase its length, and add a mix of letters (both upper and lower case) and numbers. The addition of symbols can also increase your PDF password strength. When you enter passwords, avoid using personal information or common words that can be guessed easily. 

Strong Password
Password Protection or Encryption

What's the difference between PDF password protection and encryption?

What's the difference between PDF password protection and encryption?

When you password protect PDF documents, people who enter the correct password can access the file or folder. A stronger security method is encryption, with common types being 128-bit key or 256-bit AES. Encryption turns PDF content into unreadable cipher text. To decrypt the document, authorized users need a key, which is typically a password or digital certificate.


​When you use the Acrobat online tool to password protect a PDF file, it encrypts the document for added security. If you need more advanced PDF security, you can try Adobe Acrobat Pro DC free for seven days to add encryption options, encrypt with certificates, or manage security settings to restrict editing, printing, or copying. Acrobat Pro DC also lets you edit PDFs, organize PDF pages, and convert PDFs to and from Microsoft Office apps – including Microsoft Word documents, PowerPoint presentations, and Excel spreadsheets.

Questions? We have answers.

How do I choose a strong password?

To create a strong password, increase the length of the password and add a mix of letters (both upper and lower case) and numbers. The addition of symbols can also increase password strength. When you enter passwords, avoid using personal information or common words found in a dictionary that can be guessed more easily.

How do I unlock a password-protected PDF?

When you open a PDF protected by a password, you’ll be prompted to enter the password. Type it in and click OK. Then the file will open.

What is the difference between password protection and encryption?

When you protect documents with a password, people who enter the correct password can access the file or folder. A stronger security method is encryption, with common types being 128-bit key or 256-bit AES encryption. Encryption turns document content into unreadable cipher text. To decrypt the document, authorized users need a key, which is typically a password or a digital certificate.

 

When you use the Acrobat online tool to add password protection to a PDF file, it encrypts the file for added security. If you need more advanced PDF security, you can try Adobe Acrobat Pro DC for free for seven days to add encryption options, encrypt with certificates, or manage security settings and permissions to restrict editing, printing, or copying. Acrobat Pro also lets you edit PDFs, organize PDF pages, and convert PDFs to and from Microsoft Office 365 files, including Microsoft Word documents, PowerPoint presentations, and Excel spreadsheets.

Questions? We have answers.

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Work wherever you are

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Use the highest quality online tools from the inventor of PDF. Sign in to do more with your stored files.

Password Protect PDF file

Password protect PDF files

Add PDF password protection with Adobe Acrobat’s online tool. It means a password is always needed to view the contents of your PDF file. 

Restrict unauthorized access

Restrict unauthorized access

When you password protect a PDF, you control file access. We’ll let you know if your password is weak, medium, or strong.

Password security

PDF password security you can trust

As the inventor of the PDF file format, Adobe delivers trusted document security. Password protect your PDF with confidence from any browser on Mac or Windows.

Password Protect PDF

How to password protect a PDF

How to password protect a PDF

Follow these easy steps to create a PDF password:

Click the Select a file button above or drag and drop a PDF into the drop zone.

Enter a password, then retype it to confirm the password.

Click Set password.

Download the password protected PDF document, or sign in to share it.

Strong Password

How do I choose a strong PDF password?

How do I choose a strong PDF password? 

 

To create a strong PDF password, increase its length, and add a mix of letters (both upper and lower case) and numbers. The addition of symbols can also increase your PDF password strength. When you enter passwords, avoid using personal information or common words that can be guessed easily.

Password Protection or Encryption

What's the difference between PDF password protection and encryption?

What is the difference between password protection and encryption?

When you password protect PDF documents, people who enter the correct password can access the file or folder. A stronger security method is encryption, with common types being 128-bit key or 256-bit AES. Encryption turns PDF content into unreadable cipher text. To decrypt the document, authorized users need a key, which is typically a password or digital certificate.


​When you use the Acrobat online tool to password protect a PDF file, it encrypts the document for added security. If you need more advanced PDF security, you can try Adobe Acrobat Pro DC free for seven days to add encryption options, encrypt with certificates, or manage security settings to restrict editing, printing, or copying. Acrobat Pro DC also lets you edit PDFs, organize PDF pages, and convert PDFs to and from Microsoft Office apps – including Microsoft Word documents, PowerPoint presentations, and Excel spreadsheets.

Questions? We have answers.

How do I choose a strong password?

To create a strong password, increase the length of the password and add a mix of letters (both upper and lower case) and numbers. The addition of symbols can also increase password strength. When you enter passwords, avoid using personal information or common words found in a dictionary that can be guessed more easily.

How do I unlock a password-protected PDF?

When you open a PDF protected by a password, you’ll be prompted to enter the password. Type it in and click OK. Then the file will open.

What is the difference between password protection and encryption?

When you protect documents with a password, people who enter the correct password can access the file or folder. A stronger security method is encryption, with common types being 128-bit key or 256-bit AES encryption. Encryption turns document content into unreadable cipher text. To decrypt the document, authorized users need a key, which is typically a password or a digital certificate.

 

When you use the Acrobat online tool to add password protection to a PDF file, it encrypts the file for added security. If you need more advanced PDF security, you can try Adobe Acrobat Pro DC for free for seven days to add encryption options, encrypt with certificates, or manage security settings and permissions to restrict editing, printing, or copying. Acrobat Pro also lets you edit PDFs, organize PDF pages, and convert PDFs to and from Microsoft Office 365 files, including Microsoft Word documents, PowerPoint presentations, and Excel spreadsheets.

Questions? We have answers.