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    • NCH Software
      https://www.nchsoftware.com › picopdf › encrypt
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      Encrypt Pdf Free | See How To Encrypt PDF Files

      PDF Editing Software
      SponsoredEasily add encryption to a pdf, encrypt pdf files for email and share. Download Free. Protect your PDF files with encryption. Encrypt pdf files easily on Windows PC and Mac
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      Edit PDF Text & Images · Secure PDF Files · Encrypt with Ease · Safeguard Files

      4.5/5 (1,409 reviews)

    • Adobe Acrobat
      https://www.adobe.com › online-tools › free
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      Encrypt your PDF for free | Free tool to secure your PDF

      SponsoredSecure your PDFs for free with Adobe Acrobat. Add a password and keep your content private. Protect your PDFs with Acrobat online tool. Add a password & restrict unauthorized access.
      Site visitors: Over 1M in the past month