Are my ICO files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting ICO to AVIF free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting ICO to AVIF lose quality?

AVIF is a compressed format, so some data is discarded. At the default setting the difference is not visible; you can raise the quality setting if you need to be certain.

Do I need to install anything to open AVIF files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the AVIF afterwards needs whatever software normally handles AV1 Image File Format on your device.

ICOtoAVIF

Convert ICO to AVIF

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert ICO to AVIF free and without an account: drop the file above and the AVIF is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What ICO and AVIF are for

Icon container holding several sizes in one file. Still what browsers expect as a favicon.

The most efficient web image format today. Smaller than WebP, slower to encode.

How to convert ICO to AVIF

Drop your ICO file onto this page, or click to pick one.
Choose AVIF as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished AVIF file.

ICO vs AVIF: what changes

ICO compared with AVIF
	ICO	AVIF
Full name	Windows Icon	AV1 Image File Format
File extension	.ico	.avif
Media type	image/x-icon	image/avif
Compression	Lossless — nothing is discarded	Either, depending on the setting

Quality: Some quality is given up for a smaller file. At the default setting the difference is hard to see.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.

ICO to AVIF: common questions

Are my ICO files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting ICO to AVIF free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting ICO to AVIF lose quality?: AVIF is a compressed format, so some data is discarded. At the default setting the difference is not visible; you can raise the quality setting if you need to be certain.
Do I need to install anything to open AVIF files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the AVIF afterwards needs whatever software normally handles AV1 Image File Format on your device.