lookup> .mkd

.MKD·File Extension

MKD Data & Text — A .mkd file is a MKD Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

Data & Texttext/x-markdownCompressible

Quick facts

Extension.mkd

File typeMKD Data & Text

MIME typetext/x-markdown

CategoryData & Text

Charset—

CompressibleYes

What is .mkd

What is a .mkd file?

A .mkd file is a MKD Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

In the mime-db registry it maps to text/x-markdown, and it is marked as compressible. When serving .mkd over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to text/x-markdown and is used by Markdown among others — and is delivered over HTTP via the Content-Type header.

How to open .mkd files

Use VS Code or Notepad++ to open and edit .mkd 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:

Content-Type: text/x-markdown

Common software that reads/writes .mkd:

VS CodeNotepad++Sublime Textjq

Relation chain

.mkdextension of

format

MKD Data & Textserved as

mime type

text/x-markdownsent via header

http header

Related extensions

Related MIME types

Related programming languages

Markdown

.md .livemd .markdown

Common uses

Configuration files
Data interchange between systems
API request and response payloads
Logs and data exports

How to edit .mkd files

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

How to create .mkd files

Create a new file and save it with the .mkd extension, or export this format from VS Code.

Frequently asked questions

What programs can open .mkd files?

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

How do I create a .mkd file?

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

What is the relationship between .mkd and the text/x-markdown MIME type?

text/x-markdown is the media type identifier used for .mkd files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

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