Convert ICO to AVIF

ICO to AVIF converter that runs entirely in your browser. 100% free, no signup, no upload — your files never leave your device. One-click batch conversion.

Conversions

About formats

ICO

ICO is the image container format used for Windows icons and favicons. A single ICO file can bundle multiple sizes and color depths so that the operating system can select the best resolution. ICO is still essential for desktop application icons and website favicons.

Developer
Microsoft
Initial release
1985
Compression
Uncompressed
Color depth
up to 32-bit
Transparency
Yes
Animation
No

Best for

  • Windows application icons
  • Website favicons
  • Bundling multiple icon sizes
  • Desktop app icon resources
  • Browser tab favicon images

Pros

  • +Bundles multiple sizes and color depths in one file
  • +Essential for Windows app icons
  • +Supports transparency
  • +OS selects the best resolution automatically

Cons

  • −Limited to icon use cases
  • −Not suited for general photography
  • −Less universal outside Windows
  • −No modern compression

AVIF

AVIF (AV1 Image File Format) is a modern, royalty-free image format based on the AV1 video codec. It delivers dramatically better compression than JPEG and PNG — often halving file sizes — while supporting high dynamic range (HDR), 10+ bit color, and alpha transparency. AVIF is supported by Chrome, Firefox, and Android.

Developer
Alliance for Open Media
Initial release
2019
Compression
Lossy or lossless
Color depth
up to 12-bit HDR
Transparency
Yes
Animation
Yes

Best for

  • Next-generation web image optimization
  • HDR photography on the web
  • Reducing image payload dramatically
  • Modern browser image delivery
  • High-efficiency image archival

Pros

  • +Often halves file sizes vs JPEG and PNG
  • +Supports HDR and 10+ bit color
  • +Alpha transparency and animation
  • +Royalty-free and open

Cons

  • −Slower to encode than JPG
  • −Limited support in older browsers and tools
  • −Less editing software support
  • −Hardware decoding still maturing

How to convert ICO to AVIF

  1. 1

    Select ICO files from your computer, Google Drive, Dropbox, a URL, or by dragging them onto the page.

  2. 2

    Choose avif — or any other format you need as a result (more than 200 formats supported).

  3. 3

    Let the file convert, then download your avif file right away.

ICO vs AVIF

PropertyICOAVIF
CompressionUncompressedLossy or lossless
TransparencyYesYes
AnimationNoYes
Color depthup to 32-bitup to 12-bit HDR
Open formatYesYes

When to use ICO vs AVIF

ICO

  • Windows application icons
  • Website favicons
  • Bundling multiple icon sizes
  • Desktop app icon resources
  • Browser tab favicon images

AVIF

  • Next-generation web image optimization
  • HDR photography on the web
  • Reducing image payload dramatically
  • Modern browser image delivery
  • High-efficiency image archival

Use cases for ICO → AVIF

  • Windows application icons
  • Website favicons
  • Bundling multiple icon sizes
  • Desktop app icon resources
  • Browser tab favicon images
  • Next-generation web image optimization
  • HDR photography on the web
  • Reducing image payload dramatically
  • Modern browser image delivery
  • High-efficiency image archival

Frequently Asked Questions

Is converting ICO to AVIF free?
Yes. This ICO → AVIF converter runs entirely in your browser and is completely free — no account, no credits, no watermark.
Which devices and platforms can I use to convert ICO to AVIF?
Any modern device with a current web browser: Windows, macOS, Linux, Android, iPhone and iPad. There is nothing to install — the conversion happens locally.
Are my ICO files uploaded to a server?
No. Files never leave your device. The entire ICO → AVIF conversion runs locally in your browser, so your data stays private.
Can I convert multiple ICO files at once?
Yes — batch conversion is supported. Add as many ICO files as you like and convert them to AVIF in one pass, then download the results together.
What is the maximum file size?
There is no fixed server-side limit because the conversion happens in your browser. Practical limits depend on the available memory and CPU of your device.
Will converting ICO to AVIF reduce the quality?
Because both formats use lossy compression, the AVIF output will not bring back any quality that has already been lost in your ICO file. Avoid repeated re-encoding to keep the best quality.
Will transparency be preserved when converting ICO to AVIF?
Yes. Both ICO and AVIF support alpha-channel transparency, so transparent areas of your file are kept unchanged in the AVIF output.
Will the converted AVIF file be smaller than the ICO?
Usually yes. Converting from a lossless or uncompressed format to a lossy one dramatically reduces file size. Typical savings range from 50% to 90%, depending on the quality setting you choose.

Related Conversions

Specific converters

FREE

100% Free

No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.

SIGNUP

No Signup Required

Start converting immediately without creating an account or sharing email address.

PRIVACY

Private & Secure

Your files never leave your device. All processing is completed locally for maximum privacy.

BATCH

Batch Conversion

Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.

LOCAL

Runs in Browser

Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.

FORMATS

200+ Formats

Supports a wide variety of formats including images, documents, audio, video, and more.

USER REVIEWS

Convert ICO to AVIF Quality Rating

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