HEATKEYS

Thousands of file extensions with detailed information about each file type, including a list of programs that open the files.

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FILExt.com is the file extension source. Here you

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Downloadatoz.com offers complete common file extensions list with detailed information about each file extensions and the programs that open the file format.

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This site contains a searchable database of thousands of file extensions, with information about the most common Windows applications used to open them.