ConvertWhat happens when you convert Sketch to ICO
- Sketch files are converted from the preview image saved inside the file (the first page, up to about 2000 px), not re-rendered.
- Both formats are lossless, so every pixel is kept exactly.
- Transparency is kept.
- Choose the icon sizes (16 to 256 px); they're all packed into one .ico file, ready to use as a favicon.
Sketch vs ICO
| Feature | Sketch | ICO |
|---|---|---|
| Compression | Vector | Lossless |
| Transparency | Yes | Yes |
| Animation | No | No |
| Colors | 16.7M | 16.7M |
| Best for | UI design | Favicons, app icons |
How to convert Sketch to ICO
- Drop your Sketch files on the box above, or click it to choose files. You can add many at once.
- Adjust the options if you want. The defaults work well for most files.
- Click Download for each ICO file, or "Download all" to get a ZIP.
Frequently asked questions
Is it safe to convert my files here?
Yes. Conversion happens entirely in your browser. Your files are never uploaded to a server, so nobody else can see them.
Is it free? Are there limits?
It's completely free, with no sign-up, watermarks or daily limits. The only limit is your device's memory for very large files.
Can I convert many Sketch files at once?
Yes. Drop as many files as you like; they're converted one after another and you can download them all as a ZIP.
Will converting Sketch to ICO reduce quality?
No. Both formats are lossless, so every pixel is kept.
Does ICO keep transparency?
Yes, ICO supports transparency and it's kept.
Are layers kept?
No. The file is flattened into a single image, exactly as it looks. Keep the original if you still need the layers.
Why is my Sketch image smaller than the design?
Sketch saves a preview image inside every file, and that preview is what gets converted. For full-size or per-artboard exports, export from the app itself.