Convert Bi-level images (JBIG) online for free
The converter easily converts your JBIG images to various formats - free and online. No ImageMagick or other Raster Image software needed.
The converter also works in reverse, so you can convert other "Bi-level Image File" formats to JBIG without using software like ImageMagick or a similar tool.
The .jbig file extension represents a Joint Bi-level Image Group file. It is a highly specialized raster image format designed for the lossless compression of bi-level (1-bit, black-and-white) images. Historically, it was widely adopted for fax transmissions, high-volume document scanning, and early digital archiving because it achieves significantly better compression ratios than older fax standards like CCITT Group 4. You might encounter these files when extracting raw data from scanned documents, legacy databases, or specialized imaging hardware.
To open a .jbig file natively, you generally need specialized developer libraries, command-line utilities like JBIG-KIT, or enterprise document processing SDKs from companies like Apryse. Mainstream consumer image editors rarely support it out of the box, though power tools like ImageMagick can be configured to decode it.
The biggest problem with .jbig files is their sheer lack of compatibility. You cannot view a .jbig image in standard web browsers, nor will it open in default Windows or macOS image viewers. Sending a .jbig file to a client guarantees they will not be able to open it without installing niche software or writing terminal scripts.
To make this data usable, conversion is mandatory. For web integration and general viewing without losing quality, convert to PNG, which is natively supported everywhere and handles 1-bit graphics perfectly. If you are preparing files for digital document archiving, convert to PDF or TIFF. Drag and drop your file to analyze and convert it - free, online, and without installing software.
Use Convert.Guru to open and convert your JBIG file.
Users also converted JBIG2, JPC, JB2 and MIIA files.
If you want to convert JBIG file to ICO or CUR, you can use ImageMagick or similar software from the "Bi-level Image Compression" category. In the File menu, look for Save As… or Export….
To convert RAW or AI files to JBIG, try ImageMagick or another comparable tool in the "Bi-level Image Compression" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our JBIG converter.