Add Password to PDF from Google Docs on Mac
On Mac, adding a password to a PDF does not require any additional software. The built-in Preview app supports password protection using AES encryption. This is the quickest path on macOS: convert in the Docs to PDF extension, then open in Preview and add the password.
Open the PDF in Preview
After the Docs to PDF extension downloads your PDF, double-click the file. It opens in Preview by default on Mac. If it opens in a different app, right-click the file and choose Open With > Preview.
Export with password encryption
Go to File > Export as PDF. In the dialog, click the Permissions button in the bottom left. Check 'Require password to open document.' Enter a password and verify it. You can also set a separate owner password to restrict printing and copying.
Save the protected file
Click Save. Preview saves a new PDF with the password applied. The original unprotected file remains unchanged unless you overwrite it. Open the new file to verify the password prompt appears.
Frequently Asked Questions
What encryption does Mac Preview use?
Preview applies 128-bit AES encryption when you set a password via Export as PDF. This is adequate for most personal and business use. For AES-256, use Adobe Acrobat.
Can I remove the password later in Preview?
Yes. Open the file, enter the password, go to File > Export as PDF, and uncheck the password option. Save the new file without a password.
Related article
Best Google Docs to PDF converter for Mac →Ready to Try It?
Install the free Chrome extension and start converting your Google Docs to PDF in one click.
Install Free Extension