ICO to AVIF
Convert ICO to AVIF right in your browser — nothing uploaded.
Drag & drop your ICO files here, or click to choose. Everything runs in your browser — nothing is uploaded.
This free ICO to AVIF converter turns ICO images into AVIF entirely inside your browser. Drop in as many files as you like; each is decoded and re-encoded on your own device, so nothing is uploaded, there is no queue and no size cap beyond your own memory. AVIF is a modern AV1-based format that is typically 30-50% smaller than JPG at the same quality.
Frequently Asked Questions
How do I convert ICO to AVIF?
Drop your ICO files onto the box above, or click to pick them. Each one is decoded and re-encoded as AVIF straight away and appears with its new size and a Download button. You can drop several at once — they are converted one after another without any upload wait.
Are my files uploaded to a server?
No. The file is decoded and re-encoded directly in your browser using JavaScript and WebAssembly, and never leaves your device. That is what makes it safe for private photos, client work and anything confidential, and it is why the tool keeps working with your network disconnected once the page has loaded.
Why choose AVIF?
AVIF is a modern AV1-based format that is typically 30-50% smaller than JPG at the same quality. It is encoded here by a WebAssembly AV1 encoder that runs on your own device, taking well under a second for a typical photo.
Do I need to install anything to make AVIF files?
No. No browser can create AVIF on its own, so this page loads a small WebAssembly encoder the moment you press Convert — nothing is installed and nothing is uploaded. It only downloads when you actually convert something, so the page itself stays fast.
Is there a limit or a watermark?
No limits, no watermark, no signup and no cost. Because the work happens on your own device there is no server bill to cover, so there is nothing to meter — the only real constraint is your device’s memory on very large files.
Does this work on Windows, Mac, iPhone and Android?
Yes. It runs in any modern browser on Windows, Mac, Linux, iPhone and Android with nothing to install and no account needed. Chrome, Edge, Firefox and Safari are all supported.