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Supports: ICO
ICO is a pixel-based icon format used for Windows application icons, desktop shortcuts, and website favicons. SVG (Scalable Vector Graphics) uses mathematical paths instead of pixels, scaling to any size without quality loss. Converting ICO to SVG is essential for creating resolution-independent favicons that look crisp on retina and 4K displays, modernizing legacy Windows icons for responsive web design, editing icon colors and styles with CSS without image editing software, and using icons in design tools like Figma, Illustrator, or Inkscape.
| Feature | ICO | SVG |
|---|---|---|
| Type | Raster (pixel-based) | Vector (path-based) |
| Scaling | Pixelates when enlarged | Infinite scaling, always sharp |
| Multi-size | Multiple bitmaps in one file | Single file, any size |
| CSS styling | Not possible | Full CSS color/animation support |
| File size (simple icon) | 5-50 KB | 1-10 KB |
| Browser favicon support | All browsers (legacy) | Modern browsers (Chrome, Firefox, Edge) |
| Editable in code | No | Yes (XML-based) |
| Icon Type | Conversion Quality | Notes |
|---|---|---|
| Flat/material design icons | Excellent | Clean paths, tiny file size |
| Simple logos (2-8 colors) | Excellent | Sharp edges at any resolution |
| Monochrome UI icons | Excellent | Ideal for CSS color theming |
| Icons with gradients | Good | Gradients approximated as vector fills |
| Photo-realistic icons | Poor | Stay with ICO or PNG instead |
The precision slider (1-10) controls how many decimal places are used in SVG path coordinates. Higher precision (8-10) produces smoother curves and more accurate tracing but creates larger SVG files. Lower precision (1-3) simplifies paths for smaller files. The default of 6 works well for most icons.
Yes. Modern browsers support SVG favicons via <link rel="icon" type="image/svg+xml" href="icon.svg">. SVG favicons look crisp on all displays and can be themed with CSS media queries (e.g., dark mode). For older browser compatibility, keep an ICO fallback alongside the SVG.
Simple flat icons with solid colors produce the best SVG output — clean vector paths and small file sizes. Icons with many colors, gradients, or photo-realistic detail produce larger, less clean SVGs. For complex icons, consider keeping the ICO format or converting to PNG instead.
Yes. SVG files are XML-based text files editable in vector editors (Illustrator, Inkscape, Figma) or directly in a text/code editor. You can change colors, stroke widths, and add CSS animations without re-converting.
Yes. ICO files with transparent areas produce SVGs that maintain that transparency. SVG natively supports full alpha channel transparency.