Convert HDR to ICO
Convert HDR files to ICO 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 HDR to ICO
- Drop your .hdr files above, or click Upload Files. You can add many files at once.
- ICO 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 .ico files as soon as each one finishes.
What to know about HDR to ICO conversion
- Images larger than 256×256 pixels are scaled down automatically, the maximum size of a Windows icon.
- ICO is best for website favicons and Windows icons, and opens in browsers, Windows and icon editors.
HDR vs ICO
| Feature | HDR (Radiance HDR) | ICO (Windows Icon) |
|---|---|---|
| Compression | lossless | lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Best for | HDR environment maps for lighting 3D scenes | website favicons and Windows icons |
| Opens in | Blender, 3D renderers and HDR viewers | browsers, Windows and icon editors |
HDR (Radiance HDR): A high-dynamic-range RGBE image format commonly used for environment maps and lighting in 3D rendering.
ICO (Windows Icon): An image file format for computer icons, widely used as website favicons.
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 HDR to ICO 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 HDR 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 ICO to HDR.
Convert HDR to other formats
- HDR to JPG
- HDR to PNG
- HDR to PDF
- HDR to WEBP
- HDR to GIF
- HDR to SVG
- HDR to AVIF
- HDR to TIFF
- HDR to BMP
- HDR to JXL
- HDR to PSD
- HDR to TGA
Convert other formats to ICO
- JPG to ICO
- PNG to ICO
- PDF to ICO
- WEBP to ICO
- HEIC to ICO
- GIF to ICO
- SVG to ICO
- AVIF to ICO
- TIFF to ICO
- BMP to ICO
- JXL to ICO
- PSD to ICO
See every HDR converter and ICO converter, or browse the full converter directory.