Convert ICO to HDR
Convert ICO 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)
Upload FilesPlatform Statistics
How to convert ICO to HDR
- Drop your .ico 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 ICO to HDR conversion
- HDR has no transparency, so transparent areas of the ICO are filled with white.
- HDR is best for HDR environment maps for lighting 3D scenes, and opens in Blender, 3D renderers and HDR viewers.
ICO vs HDR
| Feature | ICO (Windows Icon) | HDR (Radiance HDR) |
|---|---|---|
| Compression | lossless | lossless |
| Transparency | Yes | No |
| Animation | No | No |
| Best for | website favicons and Windows icons | HDR environment maps for lighting 3D scenes |
| Opens in | browsers, Windows and icon editors | Blender, 3D renderers and HDR viewers |
ICO (Windows Icon): An image file format for computer icons, widely used as website favicons.
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 ICO 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 ICO 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 ICO.
Convert ICO to other formats
- ICO to JPG
- ICO to PNG
- ICO to PDF
- ICO to WEBP
- ICO to GIF
- ICO to SVG
- ICO to AVIF
- ICO to TIFF
- ICO to BMP
- ICO to JXL
- ICO to PSD
- ICO to TGA
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
- TIFF to HDR
- BMP to HDR
- JXL to HDR
- PSD to HDR
See every ICO converter and HDR converter, or browse the full converter directory.