ICO opacity changer.

Yes: set the opacity here, pack the PNG as an ICO and apply it to a shortcut or folder. Semi-transparent icons let the wallpaper show through.

80 to 90 percent for overlay badges that stay visible; 20 to 40 for decorative ghost icons; 100 for the icons you use.

Yes: a 40 to 60 percent version signals an inactive tab, loading or a background state, swapped in with JavaScript.

Solid opacity: a gradient is invisible at 16 or 32 pixels. Gradients read on 64-pixel and larger desktop icons.

Solid multiplies every pixel's alpha by the opacity you set. Linear fades from full to your value across the icon in the direction you pick. Radial fades from the centre out, or the edges in, with a radius. On a 16-pixel icon, solid is the one that reads.

Yes. The new opacity multiplies the alpha the icon already has, so transparent areas stay transparent and anti-aliased edges stay soft.

The largest frame of the ICO is processed and the result is a PNG with an 8-bit alpha channel. Pack it as an ICO with the PNG to ICO tool when it goes back on a shortcut or a favicon.ico.

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 opacity changer is free and opens without a sign-in, an account or an install.

Nothing. The ICO opacity changer holds your input in the page's memory, so closing or reloading the tab clears it, and it saves nothing in this browser.

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 opacity changer: ICO transparency creator, ICO color tone changer, Favicon loading state opacity, Desktop shortcut icon fade. Each opens on its own page, free and in the browser.

The ICO opacity changer 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.