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.ATC·File Extension

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

Data & Textapplication/vnd.acucorp

Quick facts

Extension.atc

File typeATC Data & Text

MIME typeapplication/vnd.acucorp

CategoryData & Text

Charset—

Compressible—

What is .atc

What is a .atc file?

A .atc file is a ATC 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/vnd.acucorp. When serving .atc over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/vnd.acucorp — and is delivered over HTTP via the Content-Type header.

How to open .atc files

Use VS Code or Notepad++ to open and edit .atc 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/vnd.acucorp

Common software that reads/writes .atc:

VS CodeNotepad++Sublime Textjq

Relation chain

.atcextension of

format

ATC Data & Textserved as

mime type

application/vnd.acucorpsent via header

http header

Related extensions

Related MIME types

application/vnd.acucorp

.atc .acutc

Common uses

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

How to edit .atc 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 .atc files

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

Frequently asked questions

What programs can open .atc 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 .atc file?

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

What is the relationship between .atc and the application/vnd.acucorp MIME type?

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

Sources & standards

Updated 2026-09-13

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