How to Create a Website Favicon

Learn how to create a favicon from an image and choose practical favicon sizes for a website.

When you need to create a favicon online, the fastest option is often a browser-based tool that converts an existing image instead of building an icon from scratch in design software. NeroTool is designed for quick everyday tasks, with the conversion workflow kept as simple as possible.

When this is useful

A favicon generator is useful when launching a new website, refreshing a brand logo, fixing a blurry or missing browser tab icon, or preparing an icon that needs to look sharp at a very small size.

How to use NeroTool

1. Open the Favicon Generator.
2. Upload the image or logo you want to convert.
3. Let the tool generate the favicon PNG at the appropriate size.
4. Download the file and add it to your website's HTML or hosting configuration.

Tips for better results

Start from a simple, high-contrast image, since fine details tend to disappear once an icon is shrunk down to browser tab size. Test the favicon on both light and dark browser themes to make sure it stays visible, and keep the original source image in case you need to regenerate it later.

Why simple designs work best at small sizes

A favicon is often displayed at 16 to 32 pixels, far smaller than a typical logo. Detailed artwork, thin lines or small text usually blur into an unrecognizable smudge at that size. Icons built from a single bold shape, letter or symbol tend to stay legible, which is why many recognizable favicons are simplified versions of a larger brand mark rather than a direct shrink of the full logo.

Privacy and browser-based processing

NeroTool is built around browser-side processing for its client-side tools. That means the input you provide can be handled by your browser rather than being intentionally uploaded to a NeroTool application server. Some tools may still load JavaScript libraries or assets from third-party CDNs. Check the individual tool page and the privacy policy for the exact processing path.

A favicon is a tiny asset with strict visual constraints

At favicon size, thin strokes, small text and subtle details disappear quickly. A simple mark with strong contrast usually survives better than a detailed logo. If your source contains a wordmark, consider using the most recognizable symbol rather than shrinking the entire brand lockup into a tiny square.

Test the favicon where it will actually appear

Browsers may display favicons at different sizes, and pinned tabs or shortcuts can use the same asset differently. Check the result on both a light and dark browser interface and make sure the important shape remains recognizable. Keep a clean source icon so you can regenerate the favicon when the branding changes.

Use a simple, centered composition and avoid relying on tiny lettering.

Designing for a browser tab

A favicon competes with many tiny icons in a browser interface, so recognition matters more than detail. Test the generated asset next to other tabs and at the smallest practical display size. If the mark becomes an indistinct blob, simplify the source rather than relying on a larger file to solve the problem. Keep the original brand artwork separate from the tiny favicon version.