lookup> .qxb

.QXB·File Extension

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

Data & Textapplication/vnd.quark.quarkxpress

Quick facts

Extension.qxb

File typeQXB Data & Text

MIME typeapplication/vnd.quark.quarkxpress

CategoryData & Text

Charset—

Compressible—

What is .qxb

What is a .qxb file?

A .qxb file is a QXB 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.quark.quarkxpress. When serving .qxb over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .qxb files

Use VS Code or Notepad++ to open and edit .qxb 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.quark.quarkxpress

Common software that reads/writes .qxb:

VS CodeNotepad++Sublime Textjq

Relation chain

.qxbextension of

format

QXB Data & Textserved as

mime type

application/vnd.quark.quarkxpresssent via header

http header

Related extensions

Related MIME types

application/vnd.quark.quarkxpress

.qxd .qxt .qwd

Common uses

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

How to edit .qxb 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 .qxb files

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

Frequently asked questions

What programs can open .qxb 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 .qxb file?

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

What is the relationship between .qxb and the application/vnd.quark.quarkxpress MIME type?

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

Sources & standards

Updated 2026-09-13

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