XBM to G4 conversion is the process of transforming an XBM (X BitMap) bitmap image — a plain-text, monochrome C-style image format historically used for X Window System icons — into a G4 (Group 4) TIFF-compatible, 2D lossless bi-level compression format commonly used for fax and scanned monochrome images. This conversion repacks the black-and-white pixel data into a G4-compressed stream so the result is efficient for storage, transmission, and archival while remaining a 1-bit-per-pixel image.
Related guides
Practical guides to help you choose formats, preserve quality, and avoid common conversion problems.
WebP has quietly become the default image format of the modern web, delivering 25-35% smaller files than JPG and PNG with universal browser support. This 2026 guide covers current adoption stats, browser compatibility, WordPress integration, conversion workflows, and when to choose WebP over AVIF for optimal Core Web Vitals performance.
Read guide →Not sure whether to save your image as PNG or JPG? This detailed comparison covers compression, transparency, file size, web performance, and real-world use cases so you can pick the right format every time — with conversion links when you need to switch.
Read guide →Learn how to convert HEIC to JPG for maximum compatibility. This guide explains what HEIC is, why iPhones use it, the key differences between HEIC and JPG, and walks through every conversion method including online tools, iPhone settings, Windows, and Mac.
Read guide →Drag your .XBM file from your computer or use the browse function.
Confirm .g4 as the selected destination format.
Click "Convert" and download your converted .G4 file once ready.
XBM files use the MIME type image/x-xbitmap and are typically utilized in Unix-based systems for icons and cursors. G4 files use the MIME type image/g3fax or image/g4fax and are common in fax transmissions and scanned document archiving. G4 employs CCITT Group 4 compression, a lossless codec designed for monochrome images.
The G4 (.G4) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like XBM.
While specific technical details aren't available here, G4 files generally serve the purpose of storing image effectively within their domain.
Easily convert your XBM images to G4 format using our efficient online converter. Designed for speed and accuracy, our tool supports hassle-free conversion without installing any software. Whether you need to optimize files for printing or faxing, converting XBM to G4 is now simpler than ever.
XBM is a monochrome bitmap format primarily used for storing icons and cursors, whereas G4 is a compressed fax image format optimized for efficient storage and transmission. While XBM files are uncompressed and larger, G4 uses CCITT Group 4 compression to reduce file size without losing quality.
Keep XBM source files under 250 MB for smooth handling; extremely large bitmaps can be split or downsampled prior to conversion for performance.
To preserve quality, ensure XBM images are truly bi-level (1-bit); if they contain anti-aliased greys, apply controlled dithering before G4 conversion to maintain contrast.
For batch conversions, organize XBM files with consistent headers and dimensions; use command-line tools or automated scripts to apply a common TIFF/G4 profile.
Format limitation: G4 (CCITT Group 4) supports only 1-bit (monochrome) images — color or multi-bit grayscale data in XBM must be reduced to bi-level first.
This XBM to G4 converter saved me hours on a client project.
Emily R.
Graphic Designer
Reliable and quick—perfect for converting legacy image files.
Mark D.
IT Specialist
Easy to use and excellent for processing scanned documents.
Laura S.
Archivist
Start your free XBM to G4 conversion now.
Drag your file here to to upload.
Up to 250MB
If target devices expect specific TIFF tags (orientation, resolution), set DPI and metadata during conversion to avoid rendering or printing issues.