Looking for a simple tool to enter secret phrase and text to encrypt/decrypt - #offgrid

full text - Repost: Looking for a simple tool to enter secret phrase and text to encrypt/decrypt (from https://ift.tt/8OdsQ24, Looking for a simple tool to enter secret phrase and text to encrypt/decrypt)

I'm looking for something like this site:https://ift.tt/52FuiWN states clearly: "Any plain-text input or output that you enter, or we generate is not stored on this site, this tool is provided via an HTTPS URL to ensure that text cannot be stolen," but I can't just trust a message. Is there any way to validate that claim on the website? If there is a better, offline tool, I'm all ears.Please and thank you.

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