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

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    • PDFGuru
      https://pdfguru.com
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      Encrypt a PDF [Free] | Encrypt A Pdf

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      SponsoredUse PDFGuru to Protect PDF Online — the Best Multi-Device PDF Encryption Platform. Instantly Protect PDF With a Password Online. Create & Protect Various PDF Documents.

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

      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