DjVu

File Format
Name	DjVu
Ontology	Electronic File Formats Graphics DjVu
Extension(s)	.djvu
MIME Type(s)	image/vnd.djvu
PRONOM	fmt/255

DjVu is a multi-layer raster image file format for digital documents. It was originally developed at AT&T Labs, and is commonly used in book digitization, for example by the Internet Archive.

DjVu documents may include a plain text layer (e.g. from OCR), as well as other data such as a document outline, so the format can serve some of the same purposes as PDF.

Format

Files have a 4-byte preamble. The rest of the file uses IFF format.

Identification

Files begin with ASCII characters "AT&TFORM".

At offset 12 should be a tag indicating the specific file type. For DjVu v3, the possibilities are "DJVM", "DJVU", "DJVI", and "THUM".

Specifications

• DjVu v3 Reference (requires DjVu plug-in)
• DjVu 1999-04-29 (v2) Reference (requires DjVu plug-in)
• Secure DjVu Specification (requires DjVu plug-in)

Software

• DjVuLibre: Viewers, tools, C++ reference library
• Viewers & Plug-ins

Sample files

• The Specifications documents listed above
• The DjVuLibre distributions include some DjVu files.

Links

• DjVu.org
• Overview
• Wikipedia article