Convert ICO to QOI Online Free
Convert ICO favicon files to QOI format instantly in your browser. QOI preserves all pixel data losslessly with a fast encoding that suits game and real-time workflows.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts ICO to QOI instantly in your browser using the Canvas API. No file upload needed — your image stays on your device. Drop your ICO and download the result in seconds. Free and completely private.
Convert ICO to QOI
Drop your ICO file here to convert it instantly
Drag & drop your .ico file here, or click to browse
Convert to QOI instantly
ICO vs QOI: Format Comparison
Key differences between the two formats
| Feature | ICO | QOI |
|---|---|---|
| Purpose | Windows application icons | Game assets and real-time images |
| Multi-size support | Yes — bundles multiple resolutions | No — single resolution |
| Transparency | Yes — 1-bit or 8-bit alpha | Yes — full 8-bit RGBA alpha |
| Compression | Embedded PNG or BMP data | Lossless run-length encoding |
| File size | Small — icon sized images | Comparable for same pixel count |
| Software support | Universal on Windows | Needs library support |
| Best for | Browser favicons and app icons | Game sprites and fast-loading images |
When to Convert
Common scenarios where this conversion is useful
Extract icon pixels for game use
Game development often reuses existing icon art as sprites. Converting an ICO to QOI extracts the icon's pixel data in a fast lossless format that game engines can load directly.
Preserve icon transparency
ICO files include alpha transparency data. Converting to QOI preserves the full alpha channel as RGBA, keeping transparency intact for use in compositing or rendering tools.
Reuse brand icons in real-time UI
Desktop applications that need to display brand icons at runtime can store them as QOI after converting from ICO. QOI's fast decode means UI icons load with minimal latency.
Cross-platform icon asset conversion
ICO files are Windows-native. Converting to QOI creates an open-format alternative that works on any platform with a QOI library, making icons portable across Linux, macOS, and Windows pipelines.
How to Convert ICO to QOI
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1
Select your ICO file
Drag and drop your ICO file onto the converter, or click browse to choose from your files.
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2
Instant conversion
The browser converts your ICO to QOI locally using the Canvas API. No upload needed and no data leaves your device.
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3
Download the QOI
Save your converted QOI file. Ready to use immediately.
Frequently Asked Questions
QOI is a fast lossless format well-suited for game development and real-time applications. Converting an ICO to QOI extracts the pixel data into a more portable format that game engines and real-time renderers can load quickly.
The browser's Canvas API loads the best available size from the ICO container. Typically this is the largest or highest-quality image stored in the ICO file.
Yes. ICO files include alpha transparency and the QOI output will include a full 8-bit RGBA alpha channel preserving the icon's transparent areas.
No. Conversion is entirely browser-local using the Canvas API. Your file never leaves your device.
QOI (Quite OK Image) is a lossless image format designed for speed. It stores 24-bit RGB or 32-bit RGBA pixels with a simple algorithm that is faster to decode than PNG.
QOI files are typically similar in size to ICO for small icon images. ICO contains embedded PNG or BMP data; QOI's own encoding is comparable in size for small images with limited color variation.
No server limit — everything is local. ICO files are small by nature (usually under 1MB), so browser memory is never an issue.
GIMP, ImageMagick, Godot, Raylib, and libraries in Python, Rust, Go, C/C++. Standard OS image viewers do not support QOI natively, but it is straightforward to add library support.
Yes. The converter works in any modern mobile browser. Upload the ICO from your file storage and download the converted QOI.
Chrome, Firefox, Safari, and Edge all support ICO decoding and the Canvas API needed for this conversion. Any modern browser version from the past few years will work.
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