Favicon Checker Preview how a favicon looks at all standard sizes with browser tab and bookmark mockups.

What Is Favicon Checker?

A favicon checker that previews how your icon looks at all standard sizes: 16, 32, 48, 64, 96, 128, 180, 192, 256, and 512px. Includes realistic mockups showing the icon in a browser tab, address bar, and bookmark context. Each size can be downloaded individually. Essential for verifying favicon legibility at small sizes before deployment. Auto-generates all sizes from a single high-resolution source.

Why Use Favicon Checker?

• All 10 standard favicon sizes generated at once
• Browser tab and address bar mockups
• Click any size to download that resolution
• Identifies legibility issues at small sizes

Common Use Cases

Web Development

Verify favicon looks good across all sizes before deploying.

Branding

Ensure brand icon is recognizable at 16×16px.

PWA

Preview app icon at all required PWA manifest sizes.

SEO

Check favicon appearance in search engine results.

Technical Guide

The source image is drawn onto canvas at each target size using drawImage scaling. Sizes follow web standards: 16px (browser tab), 32px (taskbar), 48px (Windows), 64/96px (shortcuts), 128/180px (Apple touch), 192/256/512px (PWA). Small sizes use pixelated rendering to show actual pixels. Browser mockup uses CSS to simulate Chrome-style tab and address bar with the favicon embedded.

Tips & Best Practices

• 1
  Start with a 512px or larger square source image
• 2
  Simple, bold icons work best at 16×16px
• 3
  Check legibility at 16px — this is browser tab size
• 4
  Use distinct shapes rather than detailed illustrations for favicons

Related Tools

Image LOD Generator

Generate multiple Level of Detail (LOD) mipmap versions of an image at halved resolutions.

🖼️ Image Tools

Image Resizer

Resize images by exact pixel dimensions or percentage while maintaining aspect ratio.

🖼️ Image Tools

Favicon Generator

Generate favicons in multiple sizes (16x16, 32x32, 48x48 and more) from any image.

🖼️ Image Tools

Image to Icon

Convert images to icon sizes (16x16 to 512x512) for favicons and app icons.

🖼️ Image Tools

Frequently Asked Questions

Q Standard sizes?

16, 32, 48, 64, 96, 128, 180, 192, 256, 512px.

Q Input format?

Any image format — PNG, SVG, ICO, JPEG all work.

Q Output format?

Each size exported as PNG.

Q Browser mockup?

Shows Chrome-style tab and address bar with your icon.

Q PWA sizes?

Includes 192px and 512px required for PWA manifests.

About This Tool

Favicon Checker is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.