Format
ZIP Format
Summary
- Name
- ZIP Format
- Identifiers
-
- MIME: application/zip
- Apple Uniform Type Identifier: com.pkware.zip-archive
- PUID: x-fmt/263
- Format type
- Aggregate
- Description
- A popular archive format supported by most modern operating systems. It can contain one or more files and can utilize any of a number of compression methods.
- Note
- http://fileformats.archiveteam.org/wiki/ZIP https://fileinfo.com/extension/zip
- File extensions
-
zip - Source
- Digital Preservation Department / The National Archives
Relationships
- Has lower priority than
-
- OpenOffice Writer 1.0
- OpenOffice Calc 1.0
- OpenOffice Impress 1.0
- OpenOffice Draw 1.0
- Java Archive Format
- OpenDocument Format 1.0
- OpenDocument Database Format 1.0
- SIARD (Software-Independent Archiving of Relational Databases) 1.0
- Microsoft Office Open XML 2007 onwards
- OpenDocument Text 1.1
- OpenDocument Text 1.2
- OpenDocument Presentation 1.1
- OpenDocument Presentation 1.2
- OpenDocument Spreadsheet 1.1
- OpenDocument Spreadsheet 1.2
- OpenDocument Graphics 1.1
- OpenDocument Graphics 1.2
- OpenDocument Database Format 1.2
- CorelDraw Drawing X4
- CorelDraw Drawing X5
- OpenDocument Database Format 1.1
- Apple iBook format
- ePub Format
- ISDOCX Information System Document 5.x
- ISDOCX Information System Document 6.0.1
- EndNote Library X - X9
- EndNote Compressed Library X - X9
- EndNote Compressed Library 20
- Android Package File
Internal signatures
ZIP Format Signature 1
- Note
- Local file header at BOF (with maximum offset of 4 bytes) + central file header and end of central directory near EOF. NB. The signature byte sequence is currently massaged to steer around the known PRONOM bug in the area of right fragment matching when the longest fragment is not nearest EOF. The first fragment in the EOF byte sequence has been shortened by 1 byte to ensure that the subsequent fragment is the longest. This abbreviation does not reduce the overall signature strength too much and so will hopefully not result in any false pisitive identification. When the PRONOM bug has been fixed, the "504B01" at the start of the EOF byte sequence should be extended to "504B0102", and this note reduced.
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 4
- Byte Sequence
504B0304- Endianness
- None
- Min Frag Length
- Absolute from EOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
504B01{43-65531}504B0506{18-65531}- Endianness
- Little-endian
ZIP Format Signature 2
- Note
- BOF; Offset: 0; Magic Bytes: 'PK' followed by 0x05060000 denoting the end of the central directory
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
504B05060000- Endianness
- None
Changelog
-
Added in V118
- Release date
- 30 April 2024
Zip Format: An additional internal signature, name updated for the original internal signature, description update, library of congress identifier, documentation links and vendor. Submitted by Institute of the History of Charles University and Archive of Charles University, Preservica, Brigham Young University and The Church of Jesus Christ of Latter-Day Saints.
Zip Format: Signature researched and samples provided by Institute of the History of Charles University and Archive of Charles University, Preservica, Brigham Young University and The Church of Jesus Christ of Latter-Day Saints.
-
Updated in V50
- Release date
- 20 May 2011
ZIP Format: Existing signature refined through PRONOM Research.
-
Added in V34
- Release date
- 2 April 2010
ZIP Format: Signature improved through DROID 5.0 research