What is an FTS file?
An .FTS file can belong to several different software programs. A common use is the Windows Help Full Text Search Index created by Microsoft. This format helps the Windows operating system search through help documentation quickly and efficiently.
Another major use for the .FTS extension is the Flexible Image Transport System (FITS), a standard format used in astronomy to store scientific images and data. Other uses include FastTrack Schedule project files, GoodSync synchronization state files, and healthcare claims data summaries.
How to open FTS files?
Because an .FTS file has multiple possible meanings, it is important to identify the specific type before opening it. If it is a Windows Help file, the system uses it automatically in the background. If it is an astronomy image, tools like FITS Liberator or GIMP can open it. Schedule files require specific project management software.
If you are unsure about your file, viewer.online/fts analyzes .FTS files to identify their exact format and creator software. It shows which programs can open the file and usually previews it.
File Conversion
If you need to share your file with others, you can convert it to a more common format using convert.guru. For example, astronomy .FTS images can be converted to .JPG or .PNG, while schedule data might be exported to .CSV.
Summary
viewer.online/fts directly opens and previews .FTS files in the browser, eliminating the need to install software or troubleshoot compatibility issues.