HDR vs RGF — Comparison & Free Converter
Fast, instant HDR to RGF conversion. No signup required. Just drop your .hdr file and get .rgf in seconds.
Batch Settings
写真やイラストの表現は、光の捉え方一つで大きく変わります。HDR（ハイダイナミックレンジ）画像が持つ豊かな階調や奥行きは、時に感動的な視覚体験をもたらしますが、その特性ゆえに特定の環境や用途では扱いにくいと感じることもあるかもしれません。例えば、限られた色空間での表示や、データ容量の最適化が求められる場面などです。そこで、このHDRの魅力を保ちつつ、より汎用性の高いRGF形式への変換が役立ちます。RGFは、その柔軟性から様々なデジタルコンテンツ制作の現場で重宝されており、HDRの持つ情報を適切に変換することで、表現の幅を損なうことなく、新たな活用が可能になります。このページでは、お手持ちのHDRファイルをRGFへとスムーズに変換し、皆様のクリエイティブな活動を支援いたします。
- デジタルコミックのカラー調整
- ビジネス資料での画像最適化
- Webサイトの高速表示対応
日本のコンテンツ制作では、特に漫画やアニメ関連で色彩表現の緻密さが求められるため、HDRからRGFへの変換時には、元のHDRが持つ微妙なグラデーションや彩度をいかに忠実に再現するかが重要視されます。
About HDR to RGF Conversion
HDR or RGF — which format should you use? The answer depends on your needs. Here's a quick breakdown.
HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. It has niche platform support. RGF is a widely used file format. It has common platform support.
So when should you convert HDR to RGF? This conversion is ideal when you When you need a RGF file. This conversion helps you convert between formats quickly.
Converting HDR to RGF maintains high quality with CocoConvert's optimised encoder settings.
If you've decided RGF is the right choice, CocoConvert makes the conversion effortless. Upload your .hdr file, pick RGF, 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 HDR to RGF
- 1
Choose your HDR file
Upload your .hdr file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to RGF
Select .rgf 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 RGF file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert HDR to RGF
Your HDR file is decoded and re-encoded as RGF.
Your HDR file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in RGF format
The converted file is ready for download
Format Comparison
HDR
.hdr file
| Extension | .hdr |
| MIME Type | image/vnd.radiance |
| Category | Image |
RGF
.rgf file
| Extension | .rgf |
| MIME Type | image/x-rgf |
| Category | Image |
Should You Convert HDR to RGF?
When to Convert
- ✓When you need a RGF file
Frequently Asked Questions
Should I use HDR or RGF?
It depends on your goal. HDR preserves full quality. RGF preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is RGF higher quality than HDR?
Not necessarily. Converting HDR to RGF 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 HDR to RGF 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 HDR to RGF?
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 HDR to RGF?
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.