What is a .JBIG file?
JBIG is a lossless bi-level (black-and-white) image format built for fax and scanned documents, compressing far better than older fax codecs.
- Did you know
- JBIG modelled each pixel from its neighbours to squeeze scanned pages, the technology behind advanced fax compression.
- JBIG was standardised in 1993 as ITU-T T.82 and compressed scanned pages far better than the older Group 3 and Group 4 fax codecs.
- Patents long encumbered JBIG, one reason the simpler, royalty-free fax codecs stayed dominant for decades.
- What Analyser reads
- Decode and preview extra still-image formats in pure JavaScript - Truevision TGA, QOI, Netpbm (PPM/PGM/PBM), PCX, farbfeld, WBMP, XBM/XPM, Sun Raster and SGI are fully rendered - and read header metadata from codec-heavy formats: Radiance HDR, DirectDraw Surface (DDS) game textures, OpenEXR, JPEG 2000, JPEG XR, EPS/PostScript, Windows WMF/EMF metafiles, Apple ICNS icons, CUR/ANI cursors, MNG and Lottie animations.
- Depth of analysis
- .JBIG is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .JBIG file
- Drag a .JBIG file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.