ONYXPDF
by Onyx AI Labs
100% private — files never leave this device
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Favicon Generator — Free, In Your Browser

One image in — a complete favicon set out: a genuine multi-resolution ICO file (16/32/48 inside) plus PNGs at 16, 32, 48, 180, 192 and 512 px, zipped together with a README telling you where each file goes.

No upload · No sign-up · No file-size cap · Works offline after first load

How to generate a complete favicon set with OnyxPDF

  1. Drop a square-ish logo or image into the tool (it is centre-cropped to a square, never stretched).
  2. Click “Generate Favicon Set”.
  3. Download the ZIP.
  4. Unzip it and add the files to your site per the included README.

Why do it in your browser instead of uploading?

Good to know (honest limits)

Frequently asked questions

Which files does my website actually need?

At minimum favicon.ico and a 180 px apple-touch-icon. The set also includes 192/512 PNGs for Android/PWA manifests — the README in the ZIP shows the exact link tags.

Why did my image get cropped?

Favicons are square. The tool centre-crops to a square rather than stretching, so your logo is never distorted.

What image should I start from?

The largest, simplest version of your logo — ideally 512 px or more, with strong contrast at small sizes.

Is my logo uploaded?

No. All sizes are rendered locally and zipped in your browser.

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