AI-TOL

PNG vs ICO: Which Favicon Format Should You Use?

Confused about favicon formats? Learn the key differences between PNG and ICO, which one to choose, and best practices for modern websites in 2026.

💎 Quick Answer

Use PNG for modern websites - it's widely supported, allows transparency, and is the web standard.

Use ICO only for legacy support - if you need to support very old browsers (Internet Explorer 10 and older).

PNG vs ICO: Side-by-Side Comparison

Feature PNG ICO
Transparency ✓ Yes (Alpha channel) ✓ Yes
Multiple sizes in one file ✗ No ✓ Yes
Modern browser support ✓ Excellent ~ Good
File size (for same quality) ✓ Smaller ~ Larger
iOS/Android support ✓ Yes ✗ No
IE 6-10 support ✗ No ✓ Yes
Web standard (2026) ✓ Yes ~ Legacy

What is PNG Format?

PNG (Portable Network Graphics) is a modern image format designed specifically for the web. It's the most widely used format for favicons today.

Advantages of PNG for Favicons

  • Universal support - All modern browsers (Chrome, Firefox, Safari, Edge) support PNG favicons
  • Alpha transparency - Supports smooth transparency and semi-transparent pixels
  • Better compression - Smaller file sizes than ICO for the same quality
  • Simplicity - Easy to create, edit, and optimize
  • Mobile support - Works perfectly for iOS and Android icons

Disadvantages

  • Cannot store multiple sizes in one file (need separate files for each size)
  • Not supported by Internet Explorer 10 and older

What is ICO Format?

ICO (Icon) is a legacy format specifically designed for Windows icons. It was the original favicon format used by Internet Explorer.

Advantages of ICO for Favicons

  • Multiple sizes - Can store several icon sizes in a single file
  • Legacy support - Works in very old browsers (IE6+)
  • All-in-one - Convenient to have one file instead of multiple

Disadvantages

  • Larger file sizes compared to PNG
  • Not optimized for modern web standards
  • Doesn't work for iOS/Android touch icons
  • Requires special tools to create

Which Format Should You Choose?

✅ Recommended: Use PNG for Modern Websites

For 99% of websites in 2026, use PNG format. Here's why:

  • ✓ Internet Explorer usage is < 1% globally
  • ✓ All modern browsers prefer PNG
  • ✓ Better quality and smaller file sizes
  • ✓ Required for iOS and Android icons anyway
  • ✓ Simpler workflow and maintenance

When to Use ICO Format

Consider using ICO format if:

  • Your analytics show significant IE10- traffic (check first!)
  • You need to support very old Windows systems
  • You want a single favicon file for simplicity (at the cost of optimization)

💡 Pro Tip: Use Both Formats

You can specify both PNG and ICO in your HTML. Modern browsers will use PNG, while old IE falls back to ICO. This gives you maximum compatibility.

Favicon Format Best Practices (2026)

1️⃣ Primary Recommendation: PNG Only

For most modern websites:

<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">

2️⃣ Maximum Compatibility: PNG + ICO

If you need legacy IE support:

<!-- Modern browsers -->
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">

<!-- Legacy IE (fallback) -->
<link rel="icon" type="image/x-icon" href="/favicon.ico">

3️⃣ Don't Forget Mobile Icons

Even if using PNG for desktop:

<!-- iOS Safari -->
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">

<!-- Android/Chrome -->
<link rel="icon" type="image/png" sizes="192x192" href="/android-chrome-192x192.png">
<link rel="icon" type="image/png" sizes="512x512" href="/android-chrome-512x512.png">

Quick Decision Guide

❓

Do you need IE10- support?

Check your analytics - if it's < 1%, skip to next question

👉

Yes → Use PNG + ICO

Provide both formats for maximum compatibility

👉

No → Use PNG only

Simpler, smaller files, better quality

Generate Favicons in Your Preferred Format

Our free favicon generator supports both PNG and ICO formats. Create all sizes in seconds.

Generate Favicons Now →

Also Read

📏 Complete Favicon Sizes Guide

Learn which favicon sizes you need for different platforms and devices.

⚡ Quick Start: Make a Favicon in 5 Steps

Step-by-step guide to creating and adding a favicon to your website.

Frequently Asked Questions

Is PNG better than ICO for favicons? ▼

Yes, for modern websites PNG is better. It offers smaller file sizes, better quality, transparency support, and works perfectly with all modern browsers. ICO is only needed for legacy IE support.

Can I use both PNG and ICO? ▼

Absolutely! You can specify both formats in your HTML. Modern browsers will use PNG, while old browsers fall back to ICO. This gives you maximum compatibility.

Do I still need ICO format in 2026? ▼

Probably not. Internet Explorer usage is below 1% globally. Unless your analytics show significant IE10- traffic, PNG format is sufficient. If you want to be extra safe, provide both PNG and ICO.

What format should I use for iOS and Android? ▼

Use PNG format for iOS and Android. ICO format doesn't work for mobile touch icons. iOS requires 180x180 PNG, while Android uses 192x192 and 512x512 PNG files.