Encrypt PDF from Google Docs on Windows
On Windows, encrypting a PDF from Google Docs requires a third-party tool since Windows has no built-in PDF encryption. PDF24 Desktop is the best free option. Adobe Acrobat is the standard paid option. Both support AES-256.
PDF24 Desktop on Windows (free)
Download PDF24 Desktop from pdf24.org. After installation, open the app and select Protect PDF. Drag in the PDF you exported from Google Docs. Enter a password. In the advanced settings, select AES-256. Click Apply and save the file to your chosen location. All processing is local.
Adobe Acrobat on Windows
Open the PDF in Adobe Acrobat. Go to Tools > Protect > Encrypt with Password. Check the box to require a password to open the document. In the Compatibility dropdown, select Acrobat X and later, which enables AES-256. Enter a strong password and click OK. Save the file.
Browser-based option
For occasional use on Windows without installing anything, pdf24.org handles encryption in the browser. Upload the PDF, set a password, enable AES-256 in options, and download. Not recommended for confidential documents since files are uploaded to an external server.
Frequently Asked Questions
Is there a free AES-256 option on Windows?
Yes. PDF24 Desktop is free and supports AES-256. It runs locally, so files do not leave your machine.
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