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.BOZ·File Extension

BOZ Archive — A .boz file is a BOZ Archive. It is a compressed archive format that bundles files for easier storage and distribution.

Archiveapplication/x-bzip2

Quick facts

Extension.boz

File typeBOZ Archive

MIME typeapplication/x-bzip2

CategoryArchive

Charset—

CompressibleNo

What is .boz

What is a .boz file?

A .boz file is a BOZ Archive. It is a compressed archive format that bundles files for easier storage and distribution.

In the mime-db registry it maps to application/x-bzip2, and it is marked as non-compressible. When serving .boz over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/x-bzip2 — and is delivered over HTTP via the Content-Type header.

How to open .boz files

Use 7-Zip or WinRAR to open and edit .boz 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-bzip2

Common software that reads/writes .boz:

7-ZipWinRARtarThe Unarchiver

Relation chain

.bozextension of

format

BOZ Archiveserved as

mime type

application/x-bzip2sent via header

http header

Related extensions

Related MIME types

Common uses

File distribution
Backup bundles
Software installation packages

How to edit .boz files

Open the file with 7-Zip, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .boz files

Create a new file and save it with the .boz extension, or export this format from 7-Zip.

Frequently asked questions

What programs can open .boz files?

Common options include 7-Zip, WinRAR, tar. You can also open many of these files with built-in viewers or a browser.

How do I create a .boz file?

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

What is the relationship between .boz and the application/x-bzip2 MIME type?

application/x-bzip2 is the media type identifier used for .boz files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-09-13

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