ICO to AVIF converter
Convert ICO files to AVIF right in your browser. Nothing is uploaded, there is no sign-up, and there is no file limit.
- Runs on your device
- No upload, no queue
- Batch + ZIP download
Drop files here, or click to choose
Supports PNG, JPG, WEBP, AVIF, BMP, GIF, SVG, HEIC, TIFF and ICO — and writes GIF, TIFF and PDF too. Files stay on your device.
How to convert ICO to AVIF
- Drop your ICO file onto the box above, or click it to browse.
- Choose AVIF as the output format.
- Press convert, then download the result.
ICO vs AVIF
ICO works well for favicons and app icons. AVIF works well for modern sites squeezing every kilobyte. The table below compares the two on the things that usually decide the choice.
| ICO | AVIF | |
|---|---|---|
| Compression | Lossless | Lossy |
| Transparency | Yes | Yes |
| Best for | favicons and app icons | modern sites squeezing every kilobyte |
Questions about ICO to AVIF
- Does converting ICO to AVIF improve the image quality?
- No, and it can get slightly worse. ICO keeps every pixel; AVIF is a lossy format that discards some detail to make the file smaller.
- What happens to transparency?
- It survives. Both ICO and AVIF carry an alpha channel, so transparent areas stay transparent.
- Is there a file size limit?
- No limit that we impose. The only ceiling is your device's memory, so a very large photo or a long recording may take a few seconds.
- Are my files uploaded anywhere?
- No. The conversion runs inside this browser tab, so the file never leaves your device — go offline once the page has loaded and keep converting.