G3 vs HDR — Comparison & Free Converter
Fast, instant G3 (FAX) to HDR conversion. No signup required. Just drop your .g3 file and get .hdr in seconds.
Batch Settings
About G3 (FAX) to HDR Conversion
G3 or HDR — which format should you use? The answer depends on your needs. Here's a quick breakdown.
G3 is a widely used file format. It has common platform support. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. It has niche platform support.
So when should you convert G3 to HDR? This conversion is ideal when you When you need a HDR file. This conversion helps you convert between formats quickly.
Converting G3 to HDR maintains high quality with CocoConvert's optimised encoder settings.
If you've decided HDR is the right choice, CocoConvert makes the conversion effortless. Upload your .g3 file, pick HDR, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert G3 (FAX) to HDR
- 1
Choose your G3 file
Upload your .g3 file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to HDR
Select .hdr from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large image files.
- 4
Get your HDR file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert G3 (FAX) to HDR
Your G3 file is decoded and re-encoded as HDR.
Your G3 file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in HDR format
The converted file is ready for download
Format Comparison
G3 (FAX)
.g3 file
| Extension | .g3 |
| MIME Type | image/g3fax |
| Category | Image |
HDR
.hdr file
| Extension | .hdr |
| MIME Type | image/vnd.radiance |
| Category | Image |
Should You Convert G3 (FAX) to HDR?
When to Convert
- ✓When you need a HDR file
Frequently Asked Questions
Should I use G3 or HDR?
It depends on your goal. G3 preserves full quality. HDR preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is HDR higher quality than G3?
Not necessarily. Converting G3 to HDR maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert G3 to HDR on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for G3 to HDR?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for G3 to HDR?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.