How to Create Multi Resolution Website Favicons from PNG Logos

While modern web browsers support PNG and SVG favicons, having an authentic multi size favicon.ico in your website root remains crucial for complete backward compatibility across older browsers, bookmarks, and desktop shortcuts.

Why multi resolution icons matter

A single standard image scaled down by the browser can look blurry. A proper ICO file bundles distinct resolutions: 16x16 for browser tabs, 32x32 for bookmarks, and up to 256x256 for high density displays, allowing the browser to select the ideal scale.

How to create your favicon

1. Choose a clean, square PNG logo or graphic.
2. Upload the file to the PNG to ICO converter.
3. Click Convert to generate the multi layer ICO container.
4. Download the file as favicon.ico and upload it to your website root folder.

For maximum visual clarity, use a simple, bold mark with high contrast that remains instantly recognizable even at tiny dimensions.

Worked example: from a wide logo to a working favicon

Your logo is a symbol followed by the company name, about four times wider than it is tall. Converted as it is, the icon would be a thin unreadable strip in the middle of an empty square.

1. Open the logo in any image editor and crop it to the symbol alone, as a square.
2. If the symbol touches the edges, add a little empty space around it, so it does not look cramped in a browser tab.
3. Export a PNG of 512 by 512 pixels with a transparent background. Anything from 256 pixels up gives the full set of sizes.
4. Convert it to ICO and rename the download to favicon.ico.
5. Upload it to the main folder of the site and load the home page in a private window to see the result.
6. Look at the tab on both a light and a dark browser theme. A dark symbol can vanish on a dark tab bar. A thin light outline or a coloured tile behind the symbol solves that.

Common mistakes

• Using the full logo with text. At 16 pixels, text is noise.
• Starting from a tiny PNG. The tool will not invent the larger sizes, so the icon looks soft on sharp screens and as a desktop shortcut.
• Leaving a white background in the PNG. The favicon then appears as a white square, which looks wrong on dark tab bars.
• Forgetting the cache. You change the file, see the old icon and assume the upload failed.
• Putting the file in a subfolder without telling the page. Browsers look in the main folder by default.

Troubleshooting

• The icon does not show at all: open the address of your site followed by /favicon.ico. If you get an error page, the file is in the wrong place or has the wrong name.
• It shows in one browser but not another: clear the cache of the second browser or wait. Each browser refreshes favicons on its own schedule.
• It looks blurry in the tab: the symbol has too much detail for 16 pixels. Simplify the artwork.

Beyond favicon.ico

An ICO file covers browser tabs, bookmarks and Windows shortcuts. Phones and tablets use separate PNG icons when someone adds your site to the home screen, and those are declared in the page head or in a web app manifest. If that matters to you, export extra PNG files from the same square artwork. The ICO converter does not create them.