What is an FTL file?
The .FTL file extension is most commonly used for a FreeMarker Template File. Developed by The FreeMarker Project, these files contain text templates used to generate dynamic web pages, source code, and emails. An .FTL file combines static text with special commands that a server processes into a final document.
However, .FTL files have other common uses. They can be game modification packages for the video game Faster Than Light. They can also be 2D structural analysis models for Ftool, family tree data files from Family Tree Legends, or localization files used by Mozilla.
How to open FTL files?
If your .FTL file is a template, it is saved in plain text or XML format. You can open and edit it with any standard text editor, such as Notepad++ or Visual Studio Code.
If your .FTL file is a game modification, it is actually a compressed archive. You can rename the extension to .ZIP and open it with extraction tools like 7-Zip or WinRAR.
Analyze and view FTL files online
Because an .FTL file has multiple possible meanings, it is not always easy to know what software you need. You can use viewer.online/ftl to analyze .FTL files to identify the exact format and creator software. It allows you to inspect the file structure, extract readable text, and check whether an online preview is available.
File Conversion
If you need to change your file into a different format, we recommend using convert.guru. Depending on the original file format, you can convert text templates into standard .TXT or .HTML files. Game mod files can be converted into standard .ZIP archives for easy extraction.
Summary
Using viewer.online/ftl is a fast and simple way to identify, inspect, and understand .FTL files without installing software or dealing with compatibility problems.