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DOS file extension

The table below provides useful information about the .dos file extension. It answers questions such as:

  • What is the .dos file?
  • What program do I need to open a .dos file?
  • How can the .dos file be opened, edited or printed?
  • How can I convert .dos files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Renamed MS-DOS System File

DOS file is a Renamed MS-DOS System file. DOS files are mirrors of the original BAT, SYS, COM files from your previous operating system. Windows 95 uses this file when you boot to your previous version of MS-DOS.
Category: Other files
Application: -
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
DOS aliases:
DOS related links:
DOS related extensions:
MS-DOS Batch File

Windows Command File

MS-DOS System File

MS-DOS Overlay Data

Other types of files may also use the .dos file extension.

🚫 The .dos file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cos, dis, dks, dls, do, doc, doe, doq, dow, dox, doz, dps, ds, dso, eos

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

OpenDocument Spreadsheet
Microsoft Word Document
Capture One Settings
Ovation Pro Style Sheet
Corel WordPerfect Document
Digital Orthophoto Quadrangle Data
SOSI Spatial Data
DKS Subtitle File
Arista EOS Script
Scilab Binary Diagram

🔴 Can't open a .dos file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .dos file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .dos file extension, write to us!

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