All about KOS Files

The KOS file type is primarily associated with SWOS30.

KOS	File extension: KOS
	File type:	data file

What is a KOS file

KOS files mostly belong to SWOS30. Your KOS file stores typing test results produced by the SWOS30 system. It contains the record data from tests that evaluate your typing skills.
Key details compiled by FilExt.com include:

Test Data – Contains metrics such as speed and accuracy.

Software Source – Created by SWOS30, a tool used for recording typing performance.

FilExt.com tips: This file is a data file designed for analysis by its native application. Use SWOS30 to properly view and interpret its contents. If the data appears text-like, a plain text editor might show basic details, but the native software offers full functionality.

How do you open KOS files?

You need a suitable software like SWOS30 to open a KOS file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your KOS file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a KOS file directly in the browser:. Just drag the file onto this browser window and drop it.

Online KOS Text Viewer

Choose your .kos file to analyze

or drag and drop it here

Online File Viewer

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KOS file format details:

A file format defines how the data in the file is structured. The file format can be deduced from the file extension and the signature. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. Exact knowledge of the format is therefore important in order to solve problems occurring in files. In the following you will find our evaluation of the KOS files:

KOS is seldom used as a file extension and is used by a few programs, each with its own file format. However, the following two file formats are common:

• 40% of all KOS files use the same file format, which can be identified by the letters "1A 53 57 4F 53 33 30 00" at the beginning. These are binary files, so they do not contain words or text. A typical file size is 3 KB. The file type is relatively new. The files contain the following words: SWOS30, 5 min and June. Such files are related to attempt, writing, timing, timed, practice, timings, lesson, extra and last.
• 25% of all KOS files are based on the popular CAP file format. CAP files are compressed archives. The first bytes (the signature) are 'MSCF' (short for MicroSoft Cabinet File). They consist of unreadable binary data. Most of these files are 64 KB to 1 MB in size. The files contain the following words: MSCF and .stp.

The remaining 35% of all KOS files are different files with different signatures, the following 4 formats can be found: ArKaos Synth and KOPF. Just click the "Choose your .kos file to analyze" button on this page to find out what your KOS file is.