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.BOX·File Extension

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

Data & Textapplication/vnd.previewsystems.box

Quick facts

Extension.box

File typeBOX Data & Text

MIME typeapplication/vnd.previewsystems.box

CategoryData & Text

Charset—

Compressible—

What is .box

What is a .box file?

A .box file is a BOX 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.previewsystems.box. When serving .box over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .box files

Use VS Code or Notepad++ to open and edit .box 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.previewsystems.box

Common software that reads/writes .box:

VS CodeNotepad++Sublime Textjq

Relation chain

.boxextension of

format

BOX Data & Textserved as

mime type

application/vnd.previewsystems.boxsent via header

http header

Related extensions

Related MIME types

application/vnd.previewsystems.box

.box

Common uses

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

How to edit .box 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 .box files

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

Frequently asked questions

What programs can open .box 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 .box file?

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

What is the relationship between .box and the application/vnd.previewsystems.box MIME type?

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

Sources & standards

Updated 2026-09-13

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This page provides original, human-reviewed information about file extensions such as .box, the File Extension Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.

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