# Convert ICO to HDR

> Convert ICO to HDR online for free. Runs entirely in your browser, so your files never leave your device. Fast batch conversion, no sign-up, no watermarks.

URL: https://www.converterrr.com/ico-to-hdr

- Runs in the browser with ImageMagick: files are not uploaded, and no credits are used.
- Engines: ImageMagick (browser), ImageMagick (cloud).
- API: available. `POST /api/v1/jobs` with `"output_format": "hdr"` (paid plans).
- More: [Image converter](https://www.converterrr.com/image-converter), [ICO converter](https://www.converterrr.com/ico-converter).

## How to convert ICO to HDR

1. **Add your ICO files.** Drag and drop ICO files onto the converter, paste them, or click to browse. You can add several at once.
2. **Choose HDR.** HDR is already selected. Open Options if you want to change quality, size or metadata.
3. **Convert.** Click Convert. Your files are converted right in your browser in seconds.
4. **Download your HDR.** Download each HDR file, or everything at once as a ZIP.

## Good to know

- HDR doesn't support transparency, so transparent areas are filled with white.
- ICO files are typically used for favicons and Windows application icons, while HDR is best for HDRI environment maps in 3D software.
- This conversion runs on ImageMagick, running locally in your browser — nothing is uploaded and it works even on slow connections.

## ICO vs HDR

|  | ICO | HDR |
| --- | --- | --- |
| Full name | Windows Icon | Radiance HDR |
| Type | Image | Image |
| Extensions | .ico | .hdr |
| MIME type | image/x-icon | image/vnd.radiance |
| Best for | favicons and Windows application icons | HDRI environment maps in 3D software |
| Properties | transparency | HDR |

**ICO:** ICO is the Windows icon format. A single ICO can hold several sizes of the same icon, which is why it's still used for website favicons.

**HDR:** Radiance HDR (RGBE) stores high-dynamic-range images and is widely used for environment maps and image-based lighting.

The other way around: [convert HDR to ICO](https://www.converterrr.com/hdr-to-ico).

## Related conversions

- [HDR to ICO](https://www.converterrr.com/hdr-to-ico) (in the browser)
- [ICO to PNG](https://www.converterrr.com/ico-to-png) (in the browser)
- [PNG to HDR](https://www.converterrr.com/png-to-hdr) (in the browser)
- [ICO to JPG](https://www.converterrr.com/ico-to-jpg) (in the browser)
- [JPG to HDR](https://www.converterrr.com/jpg-to-hdr) (in the browser)
- [ICO to WebP](https://www.converterrr.com/ico-to-webp) (in the browser)
- [WebP to HDR](https://www.converterrr.com/webp-to-hdr) (in the browser)
- [ICO to JPEG](https://www.converterrr.com/ico-to-jpeg) (in the browser)
- [HEIC to HDR](https://www.converterrr.com/heic-to-hdr) (in the browser)
- [ICO to PDF](https://www.converterrr.com/ico-to-pdf) (cloud)
- [JPEG to HDR](https://www.converterrr.com/jpeg-to-hdr) (in the browser)
- [ICO to GIF](https://www.converterrr.com/ico-to-gif) (in the browser)

## Convert ICO to other formats

[ICO to PNG](https://www.converterrr.com/ico-to-png), [ICO to JPG](https://www.converterrr.com/ico-to-jpg), [ICO to WebP](https://www.converterrr.com/ico-to-webp), [ICO to JPEG](https://www.converterrr.com/ico-to-jpeg), [ICO to PDF](https://www.converterrr.com/ico-to-pdf), [ICO to GIF](https://www.converterrr.com/ico-to-gif), [ICO to AVIF](https://www.converterrr.com/ico-to-avif), [ICO to TIFF](https://www.converterrr.com/ico-to-tiff), [ICO to BMP](https://www.converterrr.com/ico-to-bmp), [ICO to PSD](https://www.converterrr.com/ico-to-psd), [ICO to EPS](https://www.converterrr.com/ico-to-eps), [ICO to JXL](https://www.converterrr.com/ico-to-jxl), [ICO to TGA](https://www.converterrr.com/ico-to-tga), [ICO to DDS](https://www.converterrr.com/ico-to-dds), [ICO to EXR](https://www.converterrr.com/ico-to-exr), [ICO to JP2](https://www.converterrr.com/ico-to-jp2), [ICO to CUR](https://www.converterrr.com/ico-to-cur), [ICO to PPM](https://www.converterrr.com/ico-to-ppm), [ICO to QOI](https://www.converterrr.com/ico-to-qoi), [ICO to PCX](https://www.converterrr.com/ico-to-pcx), [ICO to PGM](https://www.converterrr.com/ico-to-pgm), [ICO to PBM](https://www.converterrr.com/ico-to-pbm), [ICO to PNM](https://www.converterrr.com/ico-to-pnm), [ICO to XPM](https://www.converterrr.com/ico-to-xpm)

## Convert other formats to HDR

[PNG to HDR](https://www.converterrr.com/png-to-hdr), [JPG to HDR](https://www.converterrr.com/jpg-to-hdr), [WebP to HDR](https://www.converterrr.com/webp-to-hdr), [HEIC to HDR](https://www.converterrr.com/heic-to-hdr), [JPEG to HDR](https://www.converterrr.com/jpeg-to-hdr), [GIF to HDR](https://www.converterrr.com/gif-to-hdr), [AVIF to HDR](https://www.converterrr.com/avif-to-hdr), [SVG to HDR](https://www.converterrr.com/svg-to-hdr), [TIFF to HDR](https://www.converterrr.com/tiff-to-hdr), [BMP to HDR](https://www.converterrr.com/bmp-to-hdr), [HEIF to HDR](https://www.converterrr.com/heif-to-hdr), [PSD to HDR](https://www.converterrr.com/psd-to-hdr), [EPS to HDR](https://www.converterrr.com/eps-to-hdr), [AI to HDR](https://www.converterrr.com/ai-to-hdr), [JXL to HDR](https://www.converterrr.com/jxl-to-hdr), [CR2 to HDR](https://www.converterrr.com/cr2-to-hdr), [NEF to HDR](https://www.converterrr.com/nef-to-hdr), [DNG to HDR](https://www.converterrr.com/dng-to-hdr), [CR3 to HDR](https://www.converterrr.com/cr3-to-hdr), [ARW to HDR](https://www.converterrr.com/arw-to-hdr), [TGA to HDR](https://www.converterrr.com/tga-to-hdr), [DDS to HDR](https://www.converterrr.com/dds-to-hdr), [EXR to HDR](https://www.converterrr.com/exr-to-hdr), [RAF to HDR](https://www.converterrr.com/raf-to-hdr)

## ICO to HDR: frequently asked questions

### How do I convert ICO to HDR?

Drop your ICO file onto the converter above, make sure HDR is selected, and click Convert. When it's done, download the HDR file — it usually takes a few seconds.

### Is it safe to convert ICO to HDR here?

Yes. ICO to HDR conversion happens entirely inside your browser using WebAssembly, so your file is never uploaded to any server.

### Is the ICO to HDR converter free?

Yes — free with no watermark. Signed-out visitors can convert 25 files a day, and a free account raises that to 250.

### Will converting ICO to HDR reduce quality?

No — HDR preserves the content of your ICO file as faithfully as the format allows.

### Can I convert multiple ICO files at once?

Yes. Add up to 5 files at a time without an account, 10 with a free account and up to 500 on paid plans, then download them individually or as a single ZIP.

### Can I convert HDR back to ICO?

Yes — use our HDR to ICO converter. Note that converting back and forth between formats can't recover detail lost to lossy compression.