Welcome to OpenFileSupport.com

OpenFileSupport.com is an online file extension resource center. Our goal is to provide accurate and updated information about file extension types, guide you to find the most suitable file viewer/opener program for your PC, and provide support and assistance to open and view your files.

What is a File Extension

A file extension is the suffix at the end of a file name. It indicates the file type. For instance, you can tell that a file named “my-term-report.doc” is a Microsoft Word Document file because of the “.doc” extension. Similarly, “vacation01.jpg” is a JPEG image file and “sales.xlsx” is a Microsoft Excel Spreadsheet document file. Your computer has a central registry for each file extensions it has. For each file extension, the registry stores information related to the file definition and the programs that are supposed to open the file.

Our File Extension Database

OpenFileSupport.com provides a comprehensive file extension database containing detailed information for most all of the common file extensions. File information includes description, category, and how to open the file. The database currently contains information for over 6,000 file extensions in association with over 11,000 unique file type categories. To browse this database, click one of the file categories listed in the right panel of this page and browse to the file extension of your interest.

What if my file extension is missing or wrong?

Knowing the correct file type helps you find the right file viewer for an unknown file. Usually, the file extension, which follows the file name (like .docx or .mps3), will indicates the file type. Nevertheless, there are also occasions when a file nam e contains no file extension or even a wrong file extension. This is when File Type DNA, our proprietary file type analysis technology, is the tool that's right for th job. Read more about File Type DNA.

Support and help

We have a team of technical specialists who provide expert knowledge and experience with file extensions. This includes file type and content analysis and finding the right program to open and edit files. Click here to contact us for support and help.


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Supports Windows XP, Vista, 7, and Windows 8 (32- & 64-bit)
*File Size: 3 MB, Download Time: < 1 min DSL/Dial-Up