I have already tried java applet it gets MAC address but now i want do it using javascript I have an web app in which i want store user's MAC address using javascript. How i can find MAC address of user using any browser.
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1Not possible, browsers do not give any kind of access to a device's MAC address to client scripts – Lennholm May 16 '17 at 12:31
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Javascript always run in a Browser Sandbox for security reason. That's why it's not possible to get hardware information about the device it's running the script except from the once exposed by the Browser.
Mac Address it's not exposed :D

Gian Luca Cecchi
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Is there any possible way to get MAC address..In any other language for all browse. – Sudip May 17 '17 at 04:09
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Hmm no, the only programming language known by browser is javascript. You may write a plug-in for the various browser to access these information but it's not transparent for the user because he has to download and install the plug-in – Gian Luca Cecchi May 22 '17 at 13:09