ART (AOL compressed image)

File Format
Name	ART (AOL compressed image)
Ontology	Electronic File Formats Graphics ART (AOL compressed image)
Extension(s)	.art
PRONOM	fmt/666

ART, also known as AOL compressed image or Johnson-Grace compressed file, is a lossy-compressed image file format used by America Online (AOL).

Identification

Files begin with ASCII "JG".

Unrelated formats that could be confused for this format include Jigsaw (Walter A. Kuhn), JGF5, and JGPAK.

For the two bytes at offset 2, four possibilities have been observed:

03 0e
04 0e
05 07
06 07

Software

• Graphics Workshop Professional w/ Plugin
• Older Acdsee Software compatibility

Sample files

• http://samples.libav.org/image-samples/ART/
• dexvert samples — image/aolART

Resources

• Wikipedia article
• ART Compression, from the Encyclopedia of Graphics File Formats