SRF to G4 conversion is the process of transforming images stored in the SRF raster format (commonly used for specialized imaging and some scanner outputs) into the G4 format, a Group 4 (CCITT G4) compressed monochrome image format optimized for fax-style, lossless bi-level images. This conversion re-encodes the SRF image data into the G4 compression scheme so it becomes suitable for archival, efficient transmission, or compatibility with systems that require CCITT Group 4 bi-tonal files.
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Read guide →Drag your .SRF 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.
The SRF file uses the image/vnd.sony.refraw MIME type and is commonly associated with Sony digital cameras. G4 files use the image/fax-g3 MIME type and are widely used for fax transmissions and scanned documents. G4 employs Group 4 compression codec, which is a lossless compression method ideal for black-and-white images.
The G4 (.G4) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like SRF.
While specific technical details aren't available here, G4 files generally serve the purpose of storing image effectively within their domain.
Convert your SRF files to G4 format effortlessly using our online SRF to G4 converter. Whether you need to optimize file size or ensure compatibility, our tool provides a fast and user-friendly solution for all your conversion needs.
SRF files are typically raw image files used for high-quality captures, while G4 is a compressed format mainly used for fax and document imaging. G4 offers superior compression, resulting in smaller file sizes compared to SRF. Choosing G4 improves compatibility across different systems and devices.
Keep individual SRF files under 10–50 MB for fastest browser-based conversions; larger files are best handled by desktop tools or a server pipeline.
Preserve quality by choosing adaptive thresholding or error-diffusion dithering when converting grayscale/color SRF to G4 bi-level to retain text and line-art clarity.
For batch conversion, convert in sets and monitor memory use; convert multi-page SRF to multi-page G4 TIFF to maintain page order and reduce per-file overhead.
Limitation: G4 is a bi-level (black-and-white) compression—photographic detail and grayscale information from SRF will be reduced or quantized when converted.
This SRF to G4 converter saved me so much time.
John M.
Photographer
Easy to use and reliable for quick document conversions.
Anna K.
Office Manager
The quality of the converted G4 files is excellent and perfect for our fax systems.
Mark S.
IT Specialist
Start your free SRF to G4 conversion now.
Drag your file here to to upload.
Up to 250MB
If your SRF contains color or high-bit-depth imagery, consider preprocessing (deskewing, despeckling, contrast adjustment) before conversion to improve final readability in G4.