Format

GZIP Format

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Summary

Name

GZIP Format

Identifiers

MIME: application/gzip
Apple Uniform Type Identifier: org.gnu.gnu-zip-archive
PUID: x-fmt/266

Format type

Aggregate

Description

An archive format primarily for Unix/Linux operating systems and which utilizes the GNU zip (gzip) compression method.

Format encoding

Text

Note

https://fileinfo.com/extension/gz https://filext.com/file-extension/GZ

File extensions

gz, z

Submitted by

Digital Preservation Department / The National Archives

Relationships

Can contain

Internal signatures

GZIP format

Description: Member header ID1 and ID2 fields

Byte sequences

Min Frag Length: Absolute from BOF
Offset: 0
Max offset: None
Byte Sequence: 1F8B08
Endianness: None

Changelog

V118

Release date

30 April 2024
- Updated
  
  GZIP Format: Description created and documentation links added as part of PRONOM Research Week 2023. Submitted by The Church of Jesus Christ of Latter-day Saints.
V92

Release date

20 September 2017
- Updated
  
  GZIP Format: Changed MIME type from application/x-gzip to application/gzip to match current IANA entry.
V68

Release date

1 May 2013
- Updated
  
  GZIP Format: Removed errant full stop from format extension as part of a data normalisation exercise.