ICO converter
Updated Nothing is uploaded
Convert images to Windows icon format and back. Build a multi-size .ico from a PNG, JPG or SVG, or switch to “ICO → PNG” to unpack an existing icon.
How to use the ICO converter
- Choose the direction at the top: PNG / JPG → ICO, or ICO → PNG.
- Add your file.
- For ICO output pick the sizes (16–256 px) and encoding; for PNG output pick the size to save.
- Download the result.
ICO at a glance
| Property | Value |
|---|---|
| Extension / MIME type | .ico · image/x-icon (also image/vnd.microsoft.icon) |
| Max size per image | 256 × 256 px |
| Images per file | Up to 65,535 (in practice 1–10) |
| Transparency | Alpha channel (32-bit) and/or 1-bit AND mask |
| Compression | PNG entries (Vista+) or uncompressed BMP |
ICO vs. PNG for favicons
Browsers accept PNG and SVG favicons via <link rel="icon">, but /favicon.ico is still requested automatically by many browsers, crawlers and apps. The best setup is both: an ICO with 16, 32 and 48 px plus PNG links. The favicon generator builds the complete set.
Private by design
Everything runs in your browser — your images are never uploaded, stored or seen by anyone.
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Frequently asked questions
Can I convert JPG to ICO?
Yes. JPG has no transparency, so the icon will have a solid background; use a PNG with transparency for a cut-out icon.
Can I convert SVG to ICO?
Yes. The SVG is rendered sharply at each size you select.
Which sizes should a favicon.ico contain?
16, 32 and 48 px. Add 256 px for Windows desktop icons.
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