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*Details: File format summary



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Name Microsoft Animated Cursor Format
Other names  
Identifiers PUID:  fmt/386
Classification Image (Raster)
Description Animated Cursor Format (ANI), also known as Windows NT Animated Cursor, is a chunk-based bitmap format developed by Microsoft, based on the generic Resource Interchange File Format (RIFF) specification developed by Microsoft and IBM. Structurally, an ANI file is composed of a number of chunks, each comprising a four character code chunk identifier, the chunk size, and the chunk data. It comprises a RIFF header with an ANI data type identifier, followed by a series of chunks which contain two or more bitmaps stored in an ANI file. Each bitmap is typically either a Windows cursor or icon data, but may also be raw, uncompressed bitmaps. Additional information stored in the ANI file controls the rate and the sequence in which each frame is displayed. Furthe information regarding this and other RIFF formats can be found at
Orientation Text
Byte order  
Related file formats None.
Technical Environment  
Supported until  
Format Risk  
Developed by None.
Supported by None.
Source Digital Preservation Department / The National Archives
Source date 23 Nov 2011
Source description  
Last updated 23 Nov 2011
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