HDR to AVIF — Format Comparison & Online Converter
Fast, instant HDR to AVIF conversion. No signup required. Just drop your .hdr file and get .avif in seconds.
Batch Settings
Color depth reduction: 32-bit → 12-bit
HDR stores up to 32 bits per channel, but AVIF supports only 12 bits. You may notice banding in smooth gradients (like sky or skin tones) where subtle color transitions are lost.
HDR（ハイダイナミックレンジ）画像を次世代のAVIF形式へ変換することで、色彩豊かな表現と効率的なファイル管理を両立させませんか。HDRの持つ奥行きのある光と影の描写は、まるでその場にいるかのような臨場感を生み出します。しかし、ファイルサイズが大きくなりがちなのが課題でした。AVIFは、その優れた圧縮技術により、画質を損なうことなくデータ量を大幅に削減できます。これにより、ウェブサイトの読み込み速度向上はもちろん、ストレージの節約にも貢献します。特に、繊細なグラデーションや鮮やかな色彩が求められるコンテンツにおいて、HDRとAVIFの組み合わせは、見る人の心に深く響く体験を提供することでしょう。この変換を通じて、あなたのデジタルコンテンツが新たな価値を創造するお手伝いができれば幸いです。
- デジタル漫画・イラストの配布
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日本のコンテンツ文化では、特にアニメやゲームにおける色彩表現の豊かさが重視されるため、HDRからAVIFへの変換は、制作者と鑑賞者の双方に大きな恩恵をもたらします。
About HDR to AVIF Conversion
HDR (introduced 1985) and AVIF (introduced 2019) are both image formats, but they differ in important ways. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. AVIF is the newest image format based on AV1 video codec, delivering exceptional compression — up to 50% smaller than JPEG at the same quality.
Full Name: HDR uses Radiance HDR Image, while AVIF uses AV1 Image File Format. Compression: HDR uses Lossless, while AVIF uses Lossy & Lossless. Transparency: HDR uses No, while AVIF uses Yes.
When you convert HDR to AVIF, the goal is to optimize files for fast web delivery. Converting HDR to AVIF maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your HDR file is decoded and re-encoded as AVIF. The conversion involves 4 steps: (1) your hdr file is uploaded and the format is validated, (2) the file content is decoded into its raw representation, (3) the data is re-encoded in avif format with optimal settings, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you You need a file that works in web browsers. For the opposite direction, CocoConvert also supports AVIF to HDR conversion.
How to Convert HDR to AVIF
- 1
Upload .hdr file
Select your HDR file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .avif
Set AVIF as the output format. The converter uses optimal settings based on the HDR→AVIF conversion profile.
- 3
Convert
The server-side engine decodes your HDR file and re-encodes it as AVIF. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .avif file. Multiple output files can be downloaded together.
What Happens When You Convert HDR to AVIF
Your HDR image is decoded into raw pixel data, then re-encoded as AVIF.
Your HDR file is decoded — the compressed/stored pixel data is expanded into raw RGB pixels
Pixels are re-encoded using AV1 Image File Format's lossless compression
Metadata (EXIF, ICC profiles) is transferred where AVIF supports it
The AVIF file is saved and ready for download
HDR vs AVIF — Detailed Comparison
| Feature | .HDR | .AVIF |
|---|---|---|
| Full Name | Radiance HDR Image | AV1 Image File Format |
| Compression | Lossless | Lossy & Lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| Color Depth | 32-bit float (RGBE encoding) | 10 or 12 bits/channel |
| HDR Support | Yes | Yes |
| Typical File Size | 5–50 MB | 50% smaller than JPEG at same visual quality |
| Platform Support | Very Limited | Limited |
| Browser Support | none | modern browsers |
| Year Created | 1985 | 2019 |
| Open Standard | Yes | Yes |
Should You Convert HDR to AVIF?
When to Convert
- ✓You need a file that works in web browsers
Frequently Asked Questions
What is the difference between HDR and AVIF?
HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. AVIF is the newest image format based on AV1 video codec, delivering exceptional compression — up to 50% smaller than JPEG at the same quality. Full Name: HDR uses Radiance HDR Image, while AVIF uses AV1 Image File Format. Compression: HDR uses Lossless, while AVIF uses Lossy & Lossless. Transparency: HDR uses No, while AVIF uses Yes.
Does HDR to AVIF conversion affect quality?
Converting HDR to AVIF maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, HDR or AVIF?
HDR uses lossless compression. AVIF uses both compression. The better choice depends on whether you prioritize file size or quality.
How long does HDR to AVIF conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is HDR or AVIF better for long-term storage?
HDR is better for archival since it's lossless.
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