HDR to ICO Converter
Convert HDR to ICO online for free. Our HDR to ICO converter renders your Radiance HDR images into multi-resolution icon files with frame sizes from 16×16 to 256×256 - perfect for website favicons and Windows application icons. All processing happens in your browser, no signup required.
Why Use Our HDR to ICO converter?
Instant HDR to ICO Conversion
Convert hdr to ico in seconds. Our hdr to ico converter runs entirely in your browser for instant, server-free conversion.
Secure HDR to ICO online
Your images never leave your device when you convert hdr to ico image files. 100% client-side processing guarantees complete privacy.
Multi-Resolution ICO Output
Embed multiple frame sizes (16×16 to 256×256) in one ICO file. The resulting hdr to ico file works across all Windows DPI settings and browsers.
HDR to ICO online - No Installation
Convert hdr to ico file directly in your browser. No software downloads, plugins, or accounts required to use this hdr to ico converter.
When to Convert HDR to ICO
Website Favicons
Use our hdr to ico converter to create a multi-resolution favicon.ico. Browsers pick the best frame size automatically, keeping your favicon sharp on every screen.
Windows Application Icons
Convert hdr to ico for Windows desktop apps. A proper hdr to ico file with multiple sizes ensures icons look crisp in Explorer, taskbar, and Start Menu.
Cross-Platform UI Assets
Use hdr to ico online to produce icon assets for Electron apps, NW.js, or Tauri projects that target Windows and need an hdr to ico file.
Branding & Logo Export
Brand designers convert hdr to ico image to package logo assets in ICO format for client deliverables, email signatures, and browser shortcuts.
Software Packaging
Developers use our hdr to ico converter when building installer packages (NSIS, Inno Setup, WiX) that require a valid .ico file for the setup executable icon.
Legacy System Compatibility
Convert hdr to ico file for legacy enterprise software, intranet portals, or Windows shortcuts that only recognise the classic ICO container format.
Understanding How to Convert HDR to ICO
What is HDR to ICO Conversion?
When you convert hdr to ico, you package your HDR pixels into the ICO container format that Windows, browsers, and many UI frameworks natively recognise as an icon. Unlike a plain image file, a hdr to ico file can contain multiple frame sizes - each a separate bitmap - so the operating system always picks the most appropriate resolution for the context (taskbar, desktop, high-DPI display, etc.).
How Our HDR to ICO converter Works
- Upload your HDR. Drop one or more HDR images onto the tool. Each file is decoded locally in your browser - nothing is uploaded to any server.
- Choose your frame sizes. Select one or more standard ICO sizes (16×16, 32×32, 48×48, 64×64, 128×128, 256×256). The tool scales your image into each chosen size using high-quality bicubic resampling and embeds the frames as PNG-compressed data inside the ICO container.
- Download your ICO.Click “Convert & Download ICO”. Single files download as
.ico; multiple files are bundled into a ZIP archive.
ICO Frame Sizes Explained
- 16×16 - Browser tab favicon, small taskbar icon, Windows tooltip icon.
- 32×32 - Standard Windows desktop icon, most common favicon fallback.
- 48×48- Windows Explorer “Medium icons” view, Start Menu tiles.
- 256×256- High-DPI / Retina displays, Windows Vista+ “Extra large” view; stored as a lossless PNG stream inside the ICO container.
Privacy, Compatibility & Tips
Our hdr to ico online processes everything in your browser - your hdr to ico image files never leave your device. The output ICO uses PNG-compressed frames (32-bit RGBA), which is supported by Windows Vista and later, all major browsers, and most modern icon editors. For maximum compatibility with very old software, select 32×32 as the only frame size - older applications may not read multi-resolution ICO files correctly.
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Frequently Asked Questions About HDR to ICO converter
A hdr to ico converter is a browser-based tool that transforms HDR images into the ICO container format. When you convert hdr to ico, the tool encodes your image into one or more standard icon frame sizes and packages them into a single .ico file ready for use as a favicon or Windows application icon.
For a website favicon, select 16×16, 32×32, and 48×48 - those cover every browser and device. If you also need the icon for a Windows desktop application, add 256×256 for high-DPI displays. Including all sizes creates a multi-resolution hdr to ico file that works everywhere, with only a minor increase in file size.
Absolutely. Our hdr to ico online runs entirely in your browser using the HTML5 Canvas API. Your HDR files are never uploaded to any server when you convert hdr to ico. All encoding happens on your device, so your images stay completely private throughout the process.
Yes - batch conversion is fully supported. Upload as many HDR images as you need. Each hdr to ico image file is converted to its own .ico with the frame sizes you selected. When you have multiple files, the tool bundles them into a single ZIP archive and downloads it in one click.
Blurriness at 16×16 or 32×32 is usually caused by downsampling a large, detailed image. For best results, use a simplified, high-contrast source image - ideally a logo or icon on a transparent background. Our hdr to ico converter applies bicubic resampling for smooth edges, but complex photos will always lose detail at very small icon sizes.
There is no hard limit imposed by our tool - processing is limited only by your device's available memory. Most HDR images convert instantly. Very large images (over 10 MB) may take a moment as the browser renders each frame, but all conversion still happens locally at full quality.
Yes, 100% free. Our HDR to ICO converter has no file size limits, no signup requirement, no premium tier, and no usage caps. Convert hdr to ico as many times as you need, completely free and with no watermark added to the output.