What sizes does the ICO file contain?

Each ICO output contains six embedded PNG frames: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Modern Windows and browsers select the best size automatically.

Why convert AVIF to ICO?

ICO is the standard format for Windows application icons and browser favicons. If you have a logo or graphic saved as AVIF that you want to use as an icon, converting to ICO is the correct step.

Can I convert multiple AVIF files at once?

Yes — this tool supports batch conversion. Drop up to 25+ files at once, monitor per-file status, then download individually or as a single ZIP archive.

Does my data get uploaded to a server?

Never. All AVIF decoding and ICO encoding happens entirely in your browser using JavaScript. Your files never leave your device.

What software opens ICO files?

ICO files open natively in Windows Explorer (as icons), web browsers (as favicons), GIMP, Photoshop (with a plugin), and most professional image editors.

AVIF to ICO Converter

Convert AVIF images to ICO icon files locally in your browser. Each ICO contains six sizes (16–256 px) embedded as PNG frames. Batch convert, preview thumbnails, download individually or as a ZIP. No uploads, no account required.

🖼️

Drop AVIF files here

or Browse Files · Multiple files supported

Download as ZIP ZIP named with timestamp · Individual download always available per file

What This Tool Does

Converts AVIF images — a modern next-generation format used by web designers, photographers, and developers — to ICO format entirely in your browser. Each ICO output contains six embedded PNG frames at standard icon sizes (16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels). No server upload, no account, no file size limits imposed by a backend.

Who This Is For

Web developers who need a favicon from a logo or graphic saved in AVIF format
Windows app developers who need an ICO file for application icons from AVIF artwork
Designers converting AVIF brand marks or illustrations into multi-size icon assets
Anyone who needs a quick ICO from an AVIF image without installing software

Example: Input: logo.avif (next-gen web graphic) → Output: logo.ico (multi-size icon, ready for favicon or Windows app use)

💡 Need a lossless archive instead? Try AVIF to TIFF for high-quality print output. For HEIC photos to icons, use HEIC to ICO. To optimize images for the web, convert to WebP.

Related Guides & Tutorials

Guide

AVIF to ICO: Complete Conversion Guide

What ICO format is, when to use it for favicons and Windows icons, and how to get the best results from AVIF source images.

Tutorial

How to Convert AVIF to ICO: Step-by-Step

A hands-on walkthrough for converting AVIF images to ICO in your browser — batch mode, multi-size output, ZIP download, and more.

Guide

AVIF to TIFF Converter Guide

When and why to convert AVIF to lossless TIFF for print and archiving workflows.

Tool

⬇ Image Resizer

How It Works

Drop your AVIF filesDrag multiple .avif files onto the drop zone, or click Browse Files. Thumbnails generate immediately using the browser's native AVIF decoder.

Click Convert to ICOThe browser's native createImageBitmap() API decodes each AVIF to pixel data; the ICO encoder scales to six sizes and builds a standards-compliant ICO blob in memory.

Download your ICOsDownload files individually or check "Download as ZIP" for a single timestamped archive. App resets after export.

🔒 Privacy & Security

All decoding and encoding runs entirely in your browser. AVIF files are never sent to any server — they stay in your browser's memory from load to download. This is especially important for brand assets, logos, and proprietary graphics.

You Might Also Need

AVIF to TIFF → HEIC to ICO → BMP to ICO → Image Resizer → Image to WebP →

AVIF vs ICO: Format Comparison

Property	AVIF	ICO
Primary use	Web images, photography	Application icons, favicons
Typical dimensions	Any resolution	16×16 to 256×256 px
Multi-size support	No	Yes — multiple frames in one file
Transparency (alpha)	Full RGBA support	Full 32-bit RGBA transparency
Platform support	Modern browsers, web	Windows, all browsers (favicon)
Best for	Web graphics, photos, art	App icons, favicons, Windows UI
Internal format	AV1 compressed	PNG or BMP frames embedded

Frequently Asked Questions

What sizes does the output ICO contain?▼

Each ICO file contains six PNG frames: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Windows and browsers automatically select the most appropriate size for the context.

Can I use the ICO as a favicon?▼

Yes — ICO is the original favicon format. Rename the output to favicon.ico and place it in your website root. All browsers will use it automatically, selecting the most appropriate embedded size.

Can I convert multiple files at once?▼

Yes — drop up to 25 or more files at once. The tool processes them sequentially, shows per-file status badges, and lets you download all ICOs individually or as a single timestamped ZIP.

Does the ICO support transparency?▼

Yes — the ICO frames are encoded as 32-bit RGBA PNG, which supports full alpha channel transparency. If your source AVIF has a transparent background, it will be preserved in the ICO output.

Is this tool free with no limits?▼

Yes — completely free with no file size limits, no per-conversion limits, and no account required. Processing happens in your browser so we never see your files.

What is the ZIP file named?▼

The ZIP is named dataconversioncenter_avif_to_ico_YYYYMMDDHHMM.zip using your local time — for example dataconversioncenter_avif_to_ico_202603051709.zip.