STL file extension. How to open and convert files with STL file suffix

There are 8 other file types using
the STL file extension!

.stl - Stereolithography CAD data [common]

.stl - C++ standard template library

.stl - ClarisWorks data

.stl - Micrografx Designer stylesheet

.stl - EBU-standard open and teletext

.stl - Adobe Fireworks style library

.stl - Win2020 screen subtitle

.stl - ROSE Online game data

STL file extension - SPEFO stellar spectra analysis

What is stl file? How to open stl files?

File type specification:

Various data file type

The stl file extension is associated with the SPEFO (A Simple, Yet Powerful Program for One-Dimensional Spectra Processing) for MS-DOS operating system.

The stl file stores spectra analysis file is used by SPEFO.

This stl file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

The default software associated to open stl file:

SPEFO

Company or developer:
Astronomical Institute of the Academy of Sciences of the Czech Republic

SPEFO is a small, yet powerful program used for processing stellar spectra at the Astronomical Institute of the Academy of Sciences of the Czech Republic in Ondrejov. It was originally written in 1990 by Dr. Jirí Horn for processing spectral plates obtained with the 2m telescope of the Ondrejov observatory and scanned with the local five channel microphotometer. Since then the code had been under constant improvement until the sudden death of the author in December 1994. Currently SPEFO is used mainly for the reduction of data from the Ondrejov Reticon detector (1872 pixels, 12 bit A/D), however it can process data from other instruments too, provided that they are in FITS one-dimensional format.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .stl file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

List of recommended software applications associated to the .stl file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open stl file, edit stl file, convert stl file, view stl file, play stl file etc. (if exist software for corresponding action in File-Extensions.org's database).

Unspecified and all other actions for computer programs working with stl file - SPEFO stellar spectra analysis

Click on the software link for more information about SPEFO. SPEFO uses stl file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft MS-DOS:

SPEFO

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