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You can use Apache Tika and create your own program to extract metadata, it is pretty easy to do and here is a tutorial on how to do that. As the other answer says there is no surefire way to extract metadata from every type of file but Tika covers an alright amount.


The Unix/Linux file command will extract a lot of metadata inside files, and if you are using Windows, you can install cygwin to gain access to that command. Some example output: C:\Users\stewmark\ScreenShots>file *.png ChangePW.png: PNG image data, 1167 x 1046, 8-bit/color RGB, non-interlaced ChangePW_link.png: PNG image ...


Where metadata is stored will be up to the OS and the file that created it (as you say about Notepad and Word docs). Some file types even create a separate file just to hold the metadata. Because of #1, there is no free "give me all the metadata" tool. There are tools that can find the metadata of a wide range of well-known file types, though. Because of ...

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