DNG to G4 conversion is the process of converting a camera raw image stored in Adobe's Digital Negative (DNG) container into a G4 (Group 4) fax-compressed TIFF variant suitable for monochrome, highly compressed archival or transmission. This conversion translates raw sensor data or minimally processed image data into a bilevel/compressed raster format, often applying tonal mapping and dithering to produce a black-and-white G4 raster from the original color or raw grayscale data.
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 .DNG 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.
DNG files typically use the MIME type image/x-adobe-dng and contain raw sensor data from digital cameras. G4 files use the MIME type image/tiff with CCITT Group 4 compression, commonly applied in fax machines and document scanners. The G4 codec provides efficient lossless compression ideal for monochrome images and scanned documents.
The G4 (.G4) format is commonly used for image. Understanding its characteristics can be helpful when converting to or from other formats like DNG.
While specific technical details aren't available here, G4 files generally serve the purpose of storing image effectively within their domain.
Our Online DNG to G4 Converter allows you to convert your DNG image files to the G4 format effortlessly. Enjoy a seamless, fast, and secure conversion process suitable for both professionals and casual users. No software installation required, just upload your files and get high-quality G4 images instantly.
DNG is a raw image format that stores unprocessed image data, ideal for professional photography and editing. In contrast, G4 is a compressed format primarily used for fax and scanned documents, offering smaller file sizes but less editing flexibility. Choosing between DNG and G4 depends on your need for image detail versus file compression and compatibility.
Keep originals: Always retain the original DNG; converting to G4 is lossy because G4 is bilevel and removes color and grayscale nuances.
Optimal file sizes: For clean text or line-art images, G4 yields small files (under 100 KB for single pages); photographic content can bloat or lose detail—consider downsampling or using greyscale TIFF instead.
Preserve quality: Preprocess DNG (exposure, contrast, sharpening, noise reduction) and choose adaptive thresholding or error-diffusion dithering to retain detail in photographic subjects.
Batch conversion: Use scripted tools or batch modes in image-processing apps; apply a consistent preprocessing profile to all files to avoid inconsistent thresholds across a set.
This converter made switching from DNG to G4 so easy and fast.
Emily R.
Photographer
Reliable and accurate conversion every time.
Michael B.
Graphic Designer
Great tool for preparing documents for faxing and archiving.
Linda C.
Office Manager
Start your free DNG to G4 conversion now.
Drag your file here to to upload.
Up to 250MB
Format limits: G4 is effectively monochrome (bilevel) and not suitable for full-color or continuous-tone archival—photographs will lose tonal gradation and may require halftoning/dithering.