EXR vs HDR — Comparison & Free Converter
Fast, instant OPENEXR to HDR conversion. No signup required. Just drop your .exr file and get .hdr in seconds.
Batch Settings
Transparency will be lost
EXR supports transparency, but HDR does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead.
Layers will be flattened
EXR supports multiple layers, but HDR does not. All layers will be merged into a single flat image. Keep your original EXR file if you need to edit individual layers later.
Some metadata may not survive
Your EXR file may contain extensive custom attributes metadata. HDR has limited or no support for these metadata types. Location data (GPS), camera settings, and color profiles may be stripped during conversion.
在数字图像的世界里，高动态范围（HDR）图像以其惊人的色彩深度和亮度细节，成为视觉艺术和后期制作不可或缺的一部分。而OpenEXR（EXR）文件，作为电影制作和VFX领域的工业标准，承载着原始、未经压缩的最高质量图像数据。当您需要将EXR文件中蕴含的丰富光影信息，转化为更广泛兼容、且同样能展现震撼视觉效果的HDR格式时，我们深知这不仅仅是格式转换，更是将专业级素材融入日常创作、分享与应用的关键一步。无论是为了在最新的HDR显示器上预览作品，还是为移动设备优化分享体验，抑或是整合进游戏开发流程，一次高效且无损的转换服务至关重要。我们将帮助您轻松驾驭这一转换，确保画面细节丝毫不失，色彩表现力原汁原味。
- 微信或抖音分享高品质视觉内容
- 手游开发中场景光照烘焙
- HDR电视或显示器上播放预览
考虑到中国大陆、台湾及新加坡地区用户对移动端分享和游戏内容创作的高需求，将EXR转换为HDR能更好地兼顾专业品质与便捷性，尤其方便在支持HDR的手机或平板上预览与传播。
About OPENEXR to HDR Conversion
EXR or HDR — which format should you use? The answer depends on your needs. Here's a quick breakdown.
EXR (OpenEXR) is a high-dynamic-range format used in VFX, film, and 3D rendering pipelines. It has niche platform support. HDR (Radiance) is a high-dynamic-range image format used in lighting and rendering. It has niche platform support.
Full Name: EXR uses OpenEXR Image, while HDR uses Radiance HDR Image. Compression: EXR uses Lossy & Lossless, while HDR uses Lossless. Transparency: EXR uses Yes, while HDR uses No.
So when should you convert EXR to HDR? This conversion is ideal when you When you specifically need a HDR file for your workflow. This conversion helps you convert between formats quickly.
EXR supports transparency, but HDR does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead. Common misconception: ""My file's transparent background will carry over to HDR"" — in reality, hdr doesn't support transparency. transparent areas become solid (usually white). save as png or webp if you need transparency.
If you've decided HDR is the right choice, CocoConvert makes the conversion effortless. Upload your .exr 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 OPENEXR to HDR
- 1
Choose your EXR file
Upload your .exr 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 OPENEXR to HDR
Your EXR image is decoded into raw pixel data, then re-encoded as HDR.
Your EXR file is decoded — the compressed/stored pixel data is expanded into raw RGBA (with alpha channel) pixels
Transparency is resolved: transparent pixels are composited onto a white background
Pixels are re-encoded using Radiance HDR Image's lossless compression
Metadata (EXIF, ICC profiles) is transferred where HDR supports it
The HDR file is saved and ready for download
OPENEXR vs HDR — Detailed Comparison
| Feature | .EXR | .HDR |
|---|---|---|
| Full Name | OpenEXR Image | Radiance HDR Image |
| Compression | Lossy & Lossless | Lossless |
| Transparency | Yes | No |
| Animation | No | No |
| Color Depth | 16 or 32 bits/channel (half/full float) | 32-bit float (RGBE encoding) |
| HDR Support | Yes | Yes |
| Typical File Size | 50–500 MB | 5–50 MB |
| Platform Support | Very Limited | Very Limited |
| Browser Support | none | none |
| Year Created | 2003 | 1985 |
| Open Standard | Yes | Yes |
Should You Convert OPENEXR to HDR?
When to Convert
- ✓When you specifically need a HDR file for your workflow
When NOT to Convert
- ✗You need to preserve transparent areas — HDR doesn't support transparency
- ✗You still need to edit individual layers — HDR flattens everything
Consider alternatives:
Common Mistakes When Converting OPENEXR to HDR
"My file's transparent background will carry over to HDR"
HDR doesn't support transparency. Transparent areas become solid (usually white). Save as PNG or WebP if you need transparency.
Frequently Asked Questions
Should I use EXR or HDR?
It depends on your goal. EXR 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 EXR?
Not necessarily. EXR supports transparency, but HDR does not. Transparent areas will be filled with a solid color (typically white). If you need transparency, consider converting to PNG or WebP instead. Quality depends on the compression type and settings, not just the format name.
Can I convert EXR 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 EXR 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 EXR 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.