filext.com is the file extension source. here you'll find a collection of file extensions; many linked to the programs that created the files. filext helps you identify, open, view or convert unknown files.

fileinfo is the central file extensions registry and contains a database of over 10,000 file types.

large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.

bing helps you turn information into action, making it faster and easier to go from searching to doing.

thanks to file-extension.org, you will find out what program you should use to open the files with unknown extensions. in addition, you will find here information about file conversion.