Free Toolkit

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

Favicon Checker illustration
🖼️

Favicon Checker

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

How to Use
1

Upload Icon

Drop or select a favicon or icon image.

2

Preview

See your icon rendered at all standard sizes with context mockups.

3

Download

Click any size to download the icon at that resolution.

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 Our 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

Favicon Generator

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

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Image to Icon

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

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Image Resizer

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

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Image LOD Generator

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

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Image Crop

Crop images with a visual selection rectangle to remove unwanted areas.

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Image Rotate

Rotate images by any angle with preset options for 90, 180, and 270 degrees.

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Frequently Asked Questions

QStandard sizes?
16, 32, 48, 64, 96, 128, 180, 192, 256, 512px.
QInput format?
Any image format — PNG, SVG, ICO, JPEG all work.
QOutput format?
Each size exported as PNG.
QBrowser mockup?
Shows Chrome-style tab and address bar with your icon.
QPWA sizes?
Includes 192px and 512px required for PWA manifests.

About Favicon Checker

Favicon Checker is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.