AhmadHassan-BTed/Turnitout-Humanizer ? reverse-engineered prompt

Build me a web app called Turnitout that helps people clean up papers and code before they submit or share them.

I want it to take in text files, Word docs, LaTeX files, and source code, then rewrite the human readable parts so they sound more natural while leaving equations, citations, formatting, and actual code logic untouched. It should also remove hidden weird characters, strip extra document metadata, and make the output easy to download again in the same format.

Please make the interface simple, with a clear upload area, a place to paste text, options for how strong the rewriting should be, and a preview of the cleaned result before downloading. It should feel fast, private, and straightforward, with the processing happening locally or in memory if possible.

If you need to, look up current docs online for the best way to handle file parsing and document formatting.