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.
还在为高动态范围（HDR）图片的文件大小和兼容性烦恼吗？尤其在移动设备上分享，或是上传到对格式有严格要求的平台时，笨重的HDR文件常常让人头疼。AVIF作为新一代的图片格式，不仅能保留HDR的丰富色彩和明暗细节，还能大幅度压缩文件体积，让你的视觉内容更轻巧、传输更迅速。无论是专业摄影师、设计师，还是日常喜欢分享生活点滴的朋友，将HDR转换为AVIF都能显著提升效率和用户体验。告别漫长的加载等待，迎接更流畅、更高品质的视觉未来。
- 微信朋友圈高清分享
- 游戏截图压缩上传
- 电商平台商品图优化
考虑到中国大陆、台湾和新加坡地区用户对微信生态的重度依赖，以及普遍对移动端加载速度和流量消耗的关注，AVIF的轻量化优势尤为突出，能有效改善图片分享与浏览体验。
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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