Convert ICO to AVIF
Free, fast ICO → AVIF. No watermarks, no sign-up.
How to convert ICO to AVIF
1. Upload ICO
Drop your ICO file into the converter above.
2. Confirm AVIF
Output is already set to AVIF. Adjust only if you need to.
3. Download
Convert and download your AVIF file instantly.
Format Details
ICO
ICO is the Windows icon file format used to display icons for applications, files, folders, and shortcuts in the operating system. It can contain multiple image sizes and color depths within a single file, ensuring icons look sharp at different display scales and DPI settings. ICO files are also used as website favicons — the small icon displayed in browser tabs, bookmarks, and address bars.
imageAVIF
AVIF (AV1 Image File Format) is a modern image format based on the AV1 video codec developed by the Alliance for Open Media. It delivers superior compression efficiency compared to JPEG and PNG, often reducing file sizes by 50% or more while maintaining excellent visual quality. AVIF supports HDR, wide color gamut, and transparency, making it an ideal choice for the modern web.
imageConverting ICO to AVIF: what actually changes
ICO to AVIF is one of the conversions this site performs, but the two formats are not interchangeable containers. Here is what the file keeps, what it loses, and how to get a result you can use.
What .ICO and .AVIF each hold
.ICO is a image format built for sharing, editing or publishing a picture, storing pixels, dimensions and colour depth. .AVIF is a image format built for sharing, editing or publishing a picture, storing pixels, dimensions and colour depth. Converting between them is a decision about which of those two jobs the result needs to do.
What changes in the conversion
Both files belong to the image category, so this is a like-for-like repackage: the same kind of content, stored in a different container. What changes is how .AVIF encodes pixels, dimensions and colour depth — not what the file is about.
Quality and file size
.ICO keeps every detail, but .AVIF uses lossy compression to stay small. The first conversion is where quality is decided — after that, re-saving the .AVIF again compresses it a second time. Keep your original file if you may need to re-export later.
When this conversion is the right one
Reach for .AVIF when the software, device or platform you are sending to expects it — the content is the same image, only the packaging differs. The reverse direction works the same way, so you can always convert back from .AVIF to .ICO using the same tool.
Tips for a clean ICO to AVIF conversion
Start from the original file
Convert the .ICO you started with, not an earlier .AVIF output. Every extra round trip costs quality and can accumulate formatting drift.
Check the real type, not the extension
Image/x-icon becomes image/avif. If a file was renamed rather than converted, it will fail to open — rename it back to its true extension before uploading and the conversion will recognise it.
Watch transparency and animation
If the .ICO has a transparent background or animation, confirm .AVIF supports it. Where it does not, the background is flattened onto a solid colour and only the first frame survives.
Limits worth knowing
Uploads are capped per file (30 MB, or 100 MB for video) and processed temporarily — nothing is kept as a permanent copy. For huge image files, split or compress the source first.
Frequently Asked Questions
How do I convert ICO to AVIF?
Upload your ICO file on Convertek, select AVIF as the output format, then click Convert. Your AVIF file will be ready to download instantly.
Is the ICO to AVIF converter free?
Yes. Converting ICO to AVIF on Convertek is completely free with no watermarks. Fair upload limits apply (typically 30 MB per file).
Is my file kept after conversion?
No. Files are processed temporarily and not stored permanently. Converted downloads are available only in your browser session.
What is the difference between ICO and AVIF?
ICO and AVIF are different file formats with distinct use cases. Converting between them lets you use your file in software or workflows that require the AVIF format.