Convert QOI to HDR
Convert QOI files to HDR locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
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How to convert QOI to HDR
- Drop your .qoi files above, or click Upload Files. You can add many files at once.
- HDR is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. ImageMagick runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .hdr files as soon as each one finishes.
What to know about QOI to HDR conversion
- HDR has no transparency, so transparent areas of the QOI are filled with white.
- HDR is best for HDR environment maps for lighting 3D scenes, and opens in Blender, 3D renderers and HDR viewers.
QOI vs HDR
| Feature | QOI (Quite OK Image Format) | HDR (Radiance HDR) |
|---|---|---|
| Compression | lossless | lossless |
| Transparency | Yes | No |
| Animation | No | No |
| Best for | very fast lossless encoding in apps and games | HDR environment maps for lighting 3D scenes |
| Opens in | specialized viewers and some image editors | Blender, 3D renderers and HDR viewers |
QOI (Quite OK Image Format): A fast, simple lossless image format with compression comparable to PNG and much faster encoding.
HDR (Radiance HDR): A high-dynamic-range RGBE image format commonly used for environment maps and lighting in 3D rendering.
Conversion options
- Resize by width, height or both (aspect ratio is preserved)
- Filters: grayscale, sepia, blur and sharpen
- Custom output file name
Frequently asked questions
Is it safe to convert QOI to HDR here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several QOI files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert HDR to QOI.
Convert QOI to other formats
- QOI to JPG
- QOI to PNG
- QOI to PDF
- QOI to WEBP
- QOI to GIF
- QOI to SVG
- QOI to AVIF
- QOI to ICO
- QOI to TIFF
- QOI to BMP
- QOI to JXL
- QOI to PSD
Convert other formats to HDR
- JPG to HDR
- PNG to HDR
- PDF to HDR
- WEBP to HDR
- HEIC to HDR
- GIF to HDR
- SVG to HDR
- AVIF to HDR
- ICO to HDR
- TIFF to HDR
- BMP to HDR
- JXL to HDR
See every QOI converter and HDR converter, or browse the full converter directory.