lookup> .mrc

.MRC·File Extension

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

Data & Textapplication/marc

Quick facts

Extension.mrc

File typeMRC Data & Text

MIME typeapplication/marc

CategoryData & Text

Charset—

Compressible—

What is .mrc

What is a .mrc file?

A .mrc file is a MRC 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 application/marc. When serving .mrc over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/marc and is used by mIRC Script among others — and is delivered over HTTP via the Content-Type header.

How to open .mrc files

Use VS Code or Notepad++ to open and edit .mrc 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: application/marc

Common software that reads/writes .mrc:

VS CodeNotepad++Sublime Textjq

Relation chain

.mrcextension of

format

MRC Data & Textserved as

mime type

application/marcsent via header

http header

Related extensions

Related MIME types

Related programming languages

mIRC Script

.mrc

Common uses

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

How to edit .mrc 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 .mrc files

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

Frequently asked questions

What programs can open .mrc 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 .mrc file?

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

What is the relationship between .mrc and the application/marc MIME type?

application/marc is the media type identifier used for .mrc files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-08-18

Explore this reference