FileProInfo.com is the file information database of over 15,000+ file types, software, free online apps/tools, so tools, guest blogs, videos, and images.
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Found great information about file extensions, software and also found the relative free online tools.
Convertio - File Conversion in the Cloud
LinkedIn Recruiter - LinkedIn Recruiter is a recruiting tool to hire talent from LinkedIn.
FileInfo.com - FileInfo is the central file extensions registry and contains a database of over 10,000 file types.
Lever - A modern web app for hiring. Lever is a simple, powerful way to manage lists of candidates during the hiring process.
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
Greenhouse - Greenhouse Software makes companies great at hiring.