ICO to EXR Converter

ICO to EXR conversion — fast, free, and browser-based

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Full Resolution

Convertio extracts the highest resolution image from your ICO container and converts it to EXR — preserving maximum detail.

Cloud Processing

ICO to EXR conversion runs entirely on Convertio servers — your device stays fast and responsive while the heavy lifting happens in the cloud.

Fast Processing

ICO to EXR conversion typically completes in seconds. Upload your file, choose the format, and download the result almost instantly.

How to convert ICO to EXR

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose exr or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your exr file right afterwards

About formats

ICO is the icon file format for Microsoft Windows, introduced with Windows 1.0 in 1985 and serving as the standard container for application icons, file type icons, and shortcut icons throughout the Windows ecosystem. An ICO file bundles multiple image variants within a single container — each at different sizes (16x16, 32x32, 48x48, 256x256, and others) and color depths (4-bit, 8-bit, 24-bit, 32-bit with alpha) — allowing Windows to select the most appropriate image for each display context, from tiny taskbar buttons to large desktop icons. The container structure consists of an ICONDIR header, an array of ICONDIRENTRY records describing each variant, and the image data itself. Since Windows Vista, ICO files support embedded PNG-compressed images for the larger sizes (typically 256x256), dramatically reducing file size while maintaining quality with full alpha transparency. One advantage is automatic size adaptation — Windows pulls the optimal resolution from the ICO container for each context (Explorer list view, desktop tile, Alt-Tab preview), ensuring crisp display without the application managing separate image files. The format's operating system-level integration is another core strength: ICO files serve as the identity mechanism for executables, file associations, and shortcuts across all Windows versions, and web browsers use favicon.ico for website identity in tabs and bookmarks. ICO creation and editing is supported by image editors like GIMP, Inkscape, and dedicated icon tools, and the format remains essential for Windows application development.
Developer: Microsoft
Initial release: 1985
EXR is a high-dynamic-range raster image format developed by Industrial Light & Magic (ILM) internally since 1999 and publicly released as open-source software in January 2003. OpenEXR was created to meet the demanding requirements of feature film visual effects compositing, where scenes routinely contain extreme brightness ranges — from deep shadows to specular highlights on water, metal, or light sources — that exceed the precision of 8-bit or 16-bit integer formats. EXR stores pixel data in 16-bit floating-point (half) or 32-bit floating-point per channel, providing over 30 stops of dynamic range with smooth precision across the entire luminance spectrum. The format supports an arbitrary number of channels (not just RGBA), tiled and scanline storage, multiple compression methods (lossless ZIP, lossy B44 and DWAA/DWAB for preview quality), multi-part files containing multiple views or layers, and deep pixel data where each pixel stores multiple depth-sorted samples for volumetric effects. One advantage is compositing fidelity: the floating-point precision means that color grading, exposure adjustments, lighting changes, and multi-layer compositing operations produce mathematically correct results without the banding, clipping, or quantization artifacts inherent in integer formats. EXR's adoption as the VFX industry standard is another core strength — it is the default interchange format for Foundry Nuke, Autodesk Flame, Blackmagic Fusion, Adobe After Effects, and every major 3D renderer, and its open-source C++ library is embedded in hundreds of production tools.
Initial release: January 2003

Frequently Asked Questions

Why convert ICO to EXR?

OpenEXR captures your icon with floating-point precision — useful in VFX pipelines where even small graphics need HDR-quality color representation.

How do I open EXR files?

Common options include Photoshop, Nuke, Blender, After Effects, GIMP. The format has good support across major operating systems.

Does this work on mobile devices?

Yes — the ICO to EXR converter works in any mobile browser on iOS and Android. No app installation is needed — just open convertio.tools and upload your file.

Can I convert multiple ICO files at once?

Yes — Convertio supports batch uploads. Queue several ICO files and convert them all to EXR format in a single session without repeating steps.

Are my files safe during conversion?

Convertio uses encrypted connections for all transfers. Your ICO uploads are deleted immediately after conversion, and EXR downloads are removed within 24 hours.

Which icon size gets used from my ICO?

Convertio extracts the highest resolution image stored in your ICO file for conversion to EXR — giving you the best quality available in the icon.

ICO to EXR Quality Rating

3.8 (2 votes)
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