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How to convert PDF to (La)TeX?

Has anyone written a piece of code that (at least) tries to reconstruct (standard) LaTeX from a compiled PDF file? I mean, identifying indices and exponents, common fonts, footnotes, linebreaks should mostly be algorithmizable, if somewhat error-prone. Basically I am looking for an approximative section of the map pdflatex: tex → pdf which does most of the work, leaving maybe a few minor corrections (but not the whole design) to be done at hand.

No, I am not asking for an auto-plagiarizer tool. I am sure I am not the only one here with data loss issues...

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  • While many users here are mathematicians there are many non-mathematicians here as well. Writing something like “section of the map pdflatex: tex → pdf” will probably not be universally understood and diminishes your chance of answers (also, we don't have any inline TeX renderer, hence my edit).
    – Caramdir
    Sep 20, 2011 at 2:11
  • If you want this for your own files because you have lost the source code somehow (as your last sentence suggests), you may want to have a look at Is there some way to embed LaTeX source code in a PDF file? to prevent this in the future.
    – diabonas
    Sep 20, 2011 at 9:56
  • This is duplicate the best ansers are available here tex.stackexchange.com/questions/8503/…
    – Trect
    Nov 26, 2018 at 17:21

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Have a look at InfinityReader. It is designed to convert OCRed text to latex (and does a fairly good job at that). I don't know if it can directly read pdf files.

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