A crude but simple way would be to save a HTML file with a textarea. Type in the text and pinch to zoom.
        this post was submitted on 23 Jun 2023
        
      
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    Clever, yes, this works! Thanks!
Such a simple solution, I like that.
Thanks.
It's not foss (i know that kinda defeats the purpose) but it needs no account, no permissions and has no ads.
Nice find, thanks! @brie reminded me of data:text/html, <body contenteditable> so I'll be using that "webpage," though (if I can remember it!).
I've been using embiggen on android for years but a foss alternative would be nice.