AVIF opacity changer.

Having an alpha channel and editing it are different things. This tool changes the alpha the AVIF has: lowers it, fades it in a direction, or makes variants, without an AVIF-aware editor.

The output is a PNG, so the compression is gone until you re-encode. Encode the PNG as AVIF and the alpha, gradient included, comes back small; smooth alpha compresses well in AVIF.

Yes. The new opacity multiplies the existing alpha: an element at 80 percent set to 50 ends at 40.

Both carry full 8-bit alpha; AVIF is far smaller at the same look. Edit here, then convert back to AVIF for delivery.

Chrome and Edge since 2020, Firefox since 93, Safari since 16.4. The PNG works everywhere; choose the delivery format by your readers' browsers.

Solid multiplies every pixel's alpha by the opacity you set, so an image already at 80 percent set to 50 ends at 40. Linear fades from full to your value across the image in the direction you pick. Radial fades from the centre out, or the edges in, with a radius.

Yes. The new opacity multiplies the alpha the AVIF already has, so transparent areas stay transparent and soft edges stay soft.

A PNG with an 8-bit alpha channel, which every browser writes and every site and editor opens. Re-encode it as AVIF in your build for the web: gradient alpha compresses well there, often better than in PNG.

No. The file is decoded by your browser and every pixel is handled by JavaScript on your device. The page makes no request with your image, and you can load it, go offline and keep working.

No. The AVIF opacity changer is free and opens without a sign-in, an account or an install.

Nothing. The AVIF 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 AVIF opacity changer: AVIF transparency creator, AVIF color tone changer, Next-gen image fade effects, PNG opacity changer. Each opens on its own page, free and in the browser.

The AVIF opacity changer is one of 37 in its group. The group's page, /tools/avif, 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.