lookup> .chat

.CHAT·File Extension

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

Data & Textapplication/x-chat

Quick facts

Extension.chat

File typeCHAT Data & Text

MIME typeapplication/x-chat

CategoryData & Text

Charset—

Compressible—

What is .chat

What is a .chat file?

A .chat file is a CHAT 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/x-chat. When serving .chat over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .chat files

Use VS Code or Notepad++ to open and edit .chat 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/x-chat

Common software that reads/writes .chat:

VS CodeNotepad++Sublime Textjq

Relation chain

.chatextension of

format

CHAT Data & Textserved as

mime type

application/x-chatsent via header

http header

Related extensions

Related MIME types

Common uses

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

How to edit .chat 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 .chat files

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

Frequently asked questions

What programs can open .chat 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 .chat file?

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

What is the relationship between .chat and the application/x-chat MIME type?

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

Sources & standards

Updated 2026-09-13

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