How do I password protect an existing PDF?

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Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Require a Password to Open the Document, then type the password in the corresponding field.

How do I password protect a PDF for free?

Follow these easy steps to protect your PDF with a password:

  1. Click the Select a file button above, or drag and drop a PDF into the drop zone.
  2. Enter a password, then retype it to confirm the password.
  3. Click Set password.
  4. Sign in to download or share your protected PDF.

Why can’t I password protect a PDF?

Launch Adobe Acrobat and open the PDF you would like to password-protect. Click File > Properties, then select the Security tab. Click in the Security Method list box, then choose Password Security. … Check the Require a password to open document, then enter your password.

How do I password protect a PDF in Adobe Reader?

How to Password Protect a PDF in Adobe Reader

  1. Open PDF File. Once you’ve installed Adobe Reader on your computer, open the PDF file that you want to protect with a password. …
  2. Password Protect PDF. After opening the PDF file, go to “Tools > Protect > Encrypt > Encrypt with Password”.
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How do I make a PDF read only?

Adobe Acrobat

  1. Launch Acrobat and click “File” and “Open” to open the PDF with which you would like to work. …
  2. Click “Tools,” “Protection” and then “Encrypt.” A dialog appears asking whether you would like to change the security settings on your document. …
  3. Click a compatibility level to apply to your PDF document.

How do I protect a file with a password?

Protect a document with a password

  1. Go to File > Info > Protect Document > Encrypt with Password.
  2. Type a password, then type it again to confirm it.
  3. Save the file to make sure the password takes effect.

How do you password protect a PDF for free on Windows?

Click the “Options” button at the bottom of the save dialog window that appears. At the bottom of the options window, enable the “Encrypt the document with a password” option and click “OK.” Enter the password you want to encrypt the PDF file with and then click “OK.”

How do I password protect an attachment in an email?

Follow the steps below to apply a password to a document:

  1. Click the File tab.
  2. Click Info.
  3. Click Protect Document, and then click Encrypt with Password.
  4. In the Encrypt Document box, type a password, and then click OK.
  5. In the Confirm Password box, type the password again, and then click OK.

How do I password protect a PDF file on my phone?

Begin by navigating to the password protection page on your preferred browser. Click the Select A File button to choose and upload your PDF. Create a password and enter the password, then retype it to confirm. Click Set Password for your PDF.

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How do I password protect a PDF in Chrome?

Password protect your PDF with these easy steps.

  1. Choose the Select A File button, or drag and drop your PDF into the drop zone to upload.
  2. Create a password between six and 32 characters.
  3. Enter the password and retype it to confirm.
  4. Click Set Password.