I want to the tex files from PDF files.  I have the PDF files that I get in Internet and have a lot of mathematics,  so I want to convert PDF files into tex files.  I researched in these forum, and  following links may be related ,but I couldnt understand clearly.    Please teach me are there any ways, or teach me how to use.  Thank you.  January,3rd i added. What i want is OCR,not embedded. i want pdf or images to detect the text words into tex.
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I know that hardly any information is passed to the PDF when a .tex file is compiled.  But is there a tool that can convert a PDF document back to (La)TeX?
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I have a good quality scan of a document; such scan is in pdf format.  How can I add ocr information to the pdf, so that it becomes searchable? By searchable I mean that the goal is that when viewing the pdf with evince, CTRL-F actually allows me to search in the pdf content.
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I found a beautiful example of a powerful quiz that was created using LaTeX:   This example uses JavaScript inside a PDF document. Unfortunately, there is no source available. Does anyone know where I can find it?  P.S. Maybe there are similar packages you can advise?
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I was looking through some old files recently, and it occurred to me that they might be obsolete in the future.  Are there any steps that I should take for "archiving" my documents so that they will compile properly on later versions of LaTeX?  I once went to a seminar where it was indicated that the .dvi file can be converted back into a plain TeX file, so would it be the best "archival" document?
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I have a Hanlin V3+ e-book, unfortunately it crashes too often when reading mobi files, so I want to convert them first into pdf, and then read pdf on V3+. Is there any tool for converting mobi files to pdf files? Thanks.
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I noticed that there are a lot of "beginner" resources for LaTeX, lots of novice friendly tutorials etc.  Are there similar resources available for Plain TeX that are geared towards beginners?    Please note, prior to answering, that this question only relates to "Plain TeX".     To the best of my research, all of the TeX.SE existing answers setting out beginner resources deal only with "LaTeX".  The answer:   is great for people who want to learn LaTeX.  It does not however address those people (including me) who want to get started on learning Plain TeX.  The answers given so far are well thought out "Plain TeX" beginner resources.  Related:   Related:
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Is there any python module to convert PDF files into text? I tried  found in Activestate which uses pypdf but the text generated had no space between and was of no use.
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I've been working on a project and compiled it using pdfLaTeX, then tried to compile using pdftex and got a whole lot of errors. I'd like to know why that would happen since it's a very plain file and I did not put a pdflatex option in documentclass or anything like that, and what's the real difference between them.
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I understand, that similar questions were already asked here, and I have tried some of suggested solutions (latex2rtf, converting output pdf to doc with different convertors), but didn't find one that works for me.     What are my circumstances: I work on Windows 8.1, in TexStudio, using TexLive. I use xelatex, because I need Times New Roman Cyrillic in output pdf. My text are mostly in Russian and English, don't contain equations, but contain illustrations and text fragments in Oldchurchslavonic and Greek. I use biblatex and biber for building bibliography.   Often I need to send documents in .doc format, because many journals in my knowledge area don't accept articles in .tex or .pdf. So LaTeX fits perfectly in my workflow except of the final stage.   I tried to use latex2rtf, but run into some encoding problems. What I did finally was converting pdf to doc with trial verstion of Nitro PDF and then spending about two hours cleaning the file from double spaces, hyphens turned into dashes, unexpected line breaks etc. It was definitely not the best solutoin, but I don't have time to search a different one.   Is there any solution for converting latex to .doc or .rtf that will work under described circumstances OR a pdf to doc converter that produces editable .doc?
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Is there a tool for exporting equation images to TeX? Probably something related to OCR. I have a lot of image-equations in a word document that I'd like to convert to TeX.  Note that the equations are actually images, so no word2tex-like apps would help.
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I want to be able to open files like my operating system does from console.  e.g. a .pdf file should be opened with evince or whatever the default application to open pdfs is. All the other things should work too; images -> eog, text files -> gedit and so on.   I hope that there is a solution for this, it would be really practical.
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A workaround is to use pdfcrop separately (in the terminal) to crop the PDF file we want to import.  However - is there a way to remove white margins when importing a PDF file from within the tex file?  The two common packages to import PDF files are pdfpages or graphicx. Can I 'preprocess' a file for them with pdfcrop within tex file?
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Is there a way to directly compile TeX code into the SVG image format (rather than going the detour over TeX => PDF => SVG)?  I found this question:   But I don't want to do it online - it should be a command-line call.
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Is there a way to copy from a PDF to a LaTeX document? Whenever I do it, it copies in with weird symbols in the place of LaTeX commands for example:  $$f:\mathbb{R}\rightarrow \mathbb{R}$$   copies in as     f : R ! R;   I did a quick search and I couldn't really find anything (some sort of PDF to LaTeX converter that worked well)  Am I missing something obvious or can this not be done (for some reason)?
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Is there any tool that can convert Latex documents to HTML documents, so that all math is presented with ?  (Obviously, it is fairly easy to hack together a quick Perl script that is able to do a crude conversion, but I am interested in a bit more robust solutions — at least it should get all cross-references right automatically.)
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I am editing two different TeX files simultaneously, the manuscript and the response for the referees, and generating pdf files through pdfLaTeX. How can I go from one pdf to another in the internal PDF viewer without recompiling the other file?
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My goal : I correct copies from students that I scan to pdf. I wish I could make the annotations on the scanned copies rather than on the physical paper. Today, I have to scan the copies again to have my annotations transferable to students by email. Since most of the annotations are similar, I wish to have a stock of annotations I could transfer on the copies.  I went through a lot of technologies, including many "StackExchange Questions" here. I considered pdfcomment, cooltips, fancytooltips, the OCG family (ocgx, ocgp, ocg2, ...), etc.  Two tracks attracted more specifically my attention :    pdfcomments : I like the mouseover to see the comment, the capabillity to move the annotation around so I can have a stock on a pdf and I can copy it onto the scanned copies. This would be my choice if there was not a main drawback : it accepts only plain text when I need to use mathematical notations. (It needs selected pdf readers). Because you can move comments, you can put them on any pdf, even if it is not compiled from Latex or if you don't have the source. fancytooltips : I like the mouseover to see the comment, and the capability to use LaTeX mathematical formulas and images. Drawbacks : I can't move the annotation from a pdf document to the copies. (It works with very few pdf readers.) . I am not sure whether I can put tips on non Latex pdfs.   Is there a way to have pdfcomment have images/Latex mathematical formulas (or references to formulas that can show with a mouseover) ? Or is there a way to transfer fancytooltips to a non Latex pdf ? Or are there other techniques to achieve the goal ?