Zellio.io

Favicon Generator

Turn any image into favicon.ico plus all the PNG sizes you need.

Processed locally — nothing is uploaded

About Favicon Generator

Almost nothing survives at 16 pixels — fine detail, gradients and text below a few characters all turn to mush. Icons that read at that size are usually one bold shape, so it pays to simplify the artwork before generating rather than after.

A favicon is the small icon shown in browser tabs, bookmarks and history. This generator turns any square image into a multi-resolution favicon.ico containing the 16, 32 and 48-pixel sizes browsers use, plus individual PNGs from 16 up to 512 pixels — including the 180×180 Apple touch icon and the 192/512 sizes referenced by web app manifests.

Upload a logo or icon, preview it at real favicon sizes, and download exactly the files you need. Previewing at 16 pixels before committing is the entire point — most logos that look fine in a header dissolve at tab size.

Learn how this works

How to Edit Images in the Browser Without Uploading ThemCompress, watermark and strip metadata from photos entirely on your device — why client-side image editing is faster and more private.8 min readPNG, JPEG, WebP or SVG: How to Choose an Image FormatA practical guide to picking the right image format — what each one is good at, where each falls down, and how to decide quickly.6 min read

Frequently asked questions

What sizes should a favicon include?

A classic favicon.ico bundles 16, 32 and 48px. For modern sites, also add a 180×180 Apple touch icon and 192/512px PNGs for web app manifests — all of which this tool exports.

Do I need a square image?

Yes, ideally. Favicons are square, so a square source (PNG or SVG) gives the cleanest result. Non-square images are scaled to fit each square size without distortion, but you may lose content at the edges if the source has a very different aspect ratio. A square logo or icon (1:1 aspect ratio) ensures your favicon looks good at all exported sizes from tiny 16×16px tabs to large 512×512px app icons. If you only have a rectangular logo, use an image editor to square-crop or pad it before uploading to get the best result.

Is my image uploaded?

No. Everything runs locally in your browser using standard web APIs — your text, files and inputs are never uploaded to a server, so the tool works even offline once the page has loaded.

More Favicon Generator tools

PNG to ICO Converter

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