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.
La conversion de fichiers EXR en HDR est une opération courante et souvent cruciale dans le monde de l'imagerie numérique professionnelle. L'EXR, ou OpenEXR, est plébiscité pour sa capacité à stocker des images à plage dynamique élevée avec une profondeur de couleur exceptionnelle, le rendant indispensable dans les effets visuels et l'animation. Cependant, pour une diffusion plus large, une intégration dans certains flux de post-production ou une compatibilité avec des écrans spécifiques, le format HDR (High Dynamic Range) est souvent préféré. Cette transition permet de conserver l'éclat et le détail des hautes lumières et des ombres profondes, tout en offrant une meilleure interopérabilité. Notre outil est conçu pour faciliter cette conversion, garantissant que la richesse visuelle de vos créations soit préservée, que ce soit pour des projets cinématographiques, des visualisations architecturales ou des simulations complexes.
- Archives patrimoniales numériques (France)
- Rendus architecturaux immersifs (Suisse)
- Simulations d'éclairage pour l'ingénierie (Québec)
En France et en Belgique, l'adoption du HDR est en forte croissance dans l'audiovisuel et la muséographie, rendant cette conversion essentielle pour la compatibilité avec les standards de diffusion et de conservation numérique.
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.