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    • NCH Software
      https://www.nchsoftware.com › picopdf › encrypt
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      Pdf Encryption | Download Free, Windows & Mac

      PDF Editing Software
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    • LegalTemplates
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      Protect Pdf File | Lock PDF Online for Free

      SponsoredLock/Protect PDF Documents Online From Any Devices. Simply Upload, Save, Download & Print. Upload & Protect Your PDF Documents Online. 100% Safe and Secure. No Installation Needed.
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    • Adobe Acrobat
      https://www.adobe.com › online-tools › free
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      Encrypt your PDF for free | Secure PDF files at no cost

      SponsoredEncrypt your PDFs for free with Acrobat. Add a password and ensure only authorized access. Secure your PDFs for free with Adobe Acrobat. Add a password and keep your content private