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by rgriggs 1470 days ago
I built PDFEncrypt (https://pdfencrypt.net) a couple years ago based on a very simple need from a client: to encrypt PDF files via a native Windows app, for free, without needing to upload files to a sketchy website or buy expensive software. I have been amazed at the number of visitors (4000/mo), emails, downloads, and donations the project has received. I released it as open source software, and I'm now working on V2 (almost done!) which is a complete rewrite based on user requests, as well as a bunch of new features I've dreamed up. This has been a very fun side project and good practice coding in C#.
1 comments

Do you make use of native PDF encryption features or something entirely separate?
Native PDF encryption. That way they can be opened by any PDF viewer.