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.CMD·File Extension

Windows Command Script — Windows command script.

Executable

Quick facts

Extension.cmd
File typeWindows Command Script
MIME type—
CategoryExecutable
Charset—
Compressible—
Format familybatch

What is .cmd

What is a .cmd file?

A .cmd file is a Windows Command Script — Windows command script.

In the mime-db registry it has no registered standard MIME type. When serving this file over HTTP, use a Content-Type that matches its actual format.

How to open .cmd files

  • Use cmd or Notepad++ to open and edit .cmd files.
  • Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

# No standard MIME type is registered for .cmd

Common software that reads/writes .cmd:

cmdNotepad++

Relation chain

.cmdextension of
format
batchserved as
mime type
—sent via header
http header
Content-Type

Related extensions

.bat
Windows Batch File
.accdb
Access Database
.avro
Avro Data File
.bash
Bash Script

Related programming languages

Batchfile
.bat .cmd

Common uses

  • Running programs
  • Installing software
  • System libraries

How to edit .cmd files

  • Open the file with cmd, make your changes and save.
  • Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .cmd files

  • Create a new file and save it with the .cmd extension, or export this format from cmd.

Frequently asked questions

What programs can open .cmd files?

Common options include cmd, Notepad++. You can also open many of these files with built-in viewers or a browser.

How do I create a .cmd file?

Create a new file in any text editor or the app that owns the format and save it with the .cmd extension.

Sources & standards

Updated 2026-09-13

Explore this reference

Related extensions

.bat
Windows Batch File
.accdb
Access Database
.avro
Avro Data File
.bash
Bash Script

Related programming languages

Batchfile
.bat .cmd

Related headers

Content-Type
HTTP header
Accept
HTTP header

Related methods

GET
HTTP method
POST
HTTP method
PUT
HTTP method
PATCH
HTTP method

Related status codes

200
OK
404
Not Found

about this tool

About This Tool

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