ICO color replacer.

Yes. Drop the favicon.ico, pick the color to change and the new one, and download a PNG; pack it as an ICO for your site, or serve the PNG as the favicon in modern browsers.

Yes. Transparent pixels stay transparent; only the color values of matched pixels change.

Application icons work like favicons: drop, change, download. Putting the new icon back into a compiled .exe needs a resource editor; this tool makes the icon, not the embedding.

Browsers may show a different frame from a multi-size ICO than the largest one edited here. Repack every size from the edited PNG so they match.

Drop the ICO, pick the color to change (click it in the preview or type its hex) and the color to change it to. Tolerance widens the match to nearby shades, which anti-aliased icon edges need: 10 to 20 is a good start.

Turn on preserve shades. The tool then keeps each pixel's lightness and swaps only its hue and saturation, so a folder keeps its shading and a gradient icon its depth.

The largest frame of the ICO is edited and the result is a PNG, which every editor opens and modern browsers accept as a favicon. For a classic favicon.ico, pack the PNG with the PNG to ICO tool.

No. The ICO is read and its frames decoded by JavaScript on your device; the page makes no request with your file. Load it, go offline and it still works.

No. The ICO color replacer is free and opens without a sign-in, an account or an install.

Up to 100 MB per file, the limit the tool states under its drop area. A larger file is refused with a plain message instead of being decoded.

No, it takes one file at a time. If you drop or choose several, only the first is used; run the tool again for the next one.

The edit is written as a PNG because PNG stores every pixel exactly, with a full alpha channel, so the result can be edited again without a second round of loss.

No. The browser decodes the image and the tool writes a new file from its pixels, so camera EXIF, GPS position and text chunks in the original are not copied into the result. Keep the original file if you need them.

No. The result has the same width and height in pixels as the source.

Closest to the ICO color replacer: Change a favicon's color, Windows icon recolor tool, ICO color tone changer, PNG color replacer. Each opens on its own page, free and in the browser.

The ICO color replacer is one of 37 in its group. The group's page, /tools/ico, lists them all.

The tool is free. Its interface is built from shadcn.io's own components (Button, Input, Slider and the rest of the registry under /ui), which come in React, Vue, Svelte and Solid. Pro adds the blocks and templates for the product around it.