Images & Game/Web Assets • Zero-Server RAM Execution

Convert AVIF to ICO Online - Free, Local & Instant

Convert AVIF (image/avif) to Multi-Size Favicon ICO (16x16, 32x32, 48x48, 64x64) (.ico) locally in your browser using HTML5 Canvas. Adjust compression quality, resize in pixels, and download instantly with zero server uploads.

AVIF → ICO ⇄ Swap (ICO → AVIF)

Quality: 88%

Resize (px): × Lock Ratio

ICO Sizes: 16×16 32×32 48×48 64×64

📂 Select or Drop AVIF Files Batch processing supported · 100% in-browser Canvas RAM

Technical Comparison: AVIF vs ICO

Images & Game/Web Assets

Specification	AVIF (Source)	ICO (Target)
Format Name	AV1 Image File Format	Multi-Size Favicon ICO (16x16, 32x32, 48x48, 64x64)
MIME Type	image/avif	image/x-icon
Transparency / Alpha	Yes (HDR & alpha)	Preserved for PNG, WEBP, AVIF, ICO, SVG, BMP
Compression Profile	Next-gen AV1 intra-frame	multi-resolution favicon.ico bundle for browsers, Windows apps, and game clients
Processing Engine	Native Browser Image Decoder	HTML5 Canvas + Client-Side Binary Encoder

AVIF to ICO — Before & After Example

Before (AVIF Input)

Input File:  asset.avif
MIME Type:   image/avif
Alpha:       Yes (HDR & alpha)
Compression: Next-gen AV1 intra-frame
Decoding:    Browser HTML5 Image + Canvas 2D Context

After (ICO Output)

Output File: favicon.ico (Binary Multi-Resolution Container)
Embedded PNG Frames: 16x16, 32x32, 48x48, 64x64 (32-bit RGBA)
Header:      6-byte ICONDIR + 4x16-byte ICONDIRENTRY directory
Usage:       <link rel="icon" href="/favicon.ico" sizes="any" />

Frequently Asked Questions: AVIF to ICO

Does converting AVIF to ICO upload my images to a remote server? ▾

Never. Every AVIF file you select is decoded directly in your browser using the HTML5 Canvas API and FileReader API. Your images stay in your computer or phone RAM at all times.

Can I resize and adjust compression quality when converting AVIF to ICO? ▾

Yes. Use the Quality slider (10%–100%) and the Width/Height pixel inputs above the drop zone. Keeping "Lock Ratio" checked preserves your original aspect ratio automatically.

Does this converter support batch AVIF to ICO conversion with ZIP download? ▾

Yes. Drag and drop multiple AVIF files at once; you can download each converted ICO individually or click "Download All (.ZIP)" to bundle them locally via JSZip.

Why use ICO instead of AVIF? ▾

Converting AVIF to ICO gives you multi-resolution favicon.ico bundle for browsers, Windows apps, and game clients while keeping full control over pixel dimensions and byte size.