What is an ST file?
An .ST file is a generic file extension used by many different software programs. Because this extension is so short, developers have used it for completely different purposes over the years. Some .ST files are Smalltalk source code files or PLC Structured Text code based on the IEC 61131-3 standard. Other .ST files are disk images for classic Atari ST computers. You might also encounter .ST files used as Windows Installer rollback scripts, Elasticsearch cluster states, or game state definitions in engines like Elecbyte M.U.G.E.N.
How to open ST files?
Because .ST files can contain many types of data, the correct software depends on the file's origin. You can open Smalltalk or PLC Structured Text files using a standard text editor or programming environments like CODESYS. If your file is an Atari ST disk image, you must use an emulator like Hatari to mount and read the virtual floppy disk.
Inspecting ST files online
Since an .ST file can be text, a compressed archive, or raw binary data, it is hard to know how to open it. viewer.online/st can analyze .ST files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Converting ST files
Sometimes you need to convert an .ST file to a more standard format. You can easily convert text-based code to .TXT, or convert game and disk images to other emulator formats. We recommend using convert.guru to find sensible target formats for your specific file.
Summary
viewer.online/st is useful for identifying, inspecting, and understanding .ST files without installing software or dealing with compatibility problems. It helps you quickly discover what kind of data your .ST file holds.