Image utility

Convert PNG alpha to black and white

Extract a PNG image’s alpha channel and turn its transparency into a pure black-and-white image.

Image

Alpha to black and white

Live

Image

Threshold

Invert

Open in Fuser

Runs in your browser. Your files are never uploaded.

How tools work

A tool is a small app you describe in plain words. Try this one here, then keep it on your Fuser canvas and connect it to the rest of your work.

A tool on the Fuser canvas with its controls and result

1. Try it here

Add your own file or text and adjust the controls. Live tools run in your browser, so nothing is uploaded.

Two tools chained together on the Fuser canvas

2. Open it in Fuser

Sign up free and the tool opens on your canvas with this example wired in, ready to connect to images, video or text from other nodes.

A Tool node with a description of the tool to build

3. Describe your own

Need something different? Describe the tool you want and Fuser builds it, with the controls you asked for.

Ways to use this alpha converter

Create a clear black-and-white version of transparency information for image inspection and connected Fuser workflows.

Create a transparency mask

Turn the transparent and non-transparent areas of a PNG into a black-and-white mask image.

Prepare an image for compositing

Use the result as a simple black-and-white representation of a PNG’s alpha before passing it into another image step.

Inspect transparency areas

Make alpha information easier to see by converting it into distinct black and white regions.

Control faint transparency

Adjust the threshold to decide how alpha values are separated into black and white.

Invert the alpha result

Switch the black-and-white mapping when you need the transparent and opaque areas reversed.

Build a Fuser image workflow

Pass the resulting image into another node as part of a larger workflow built around your PNG.

Frequently asked questions

It takes one image input and extracts its alpha channel as a pure black-and-white image. The result updates in your browser as you change the controls.

Threshold controls where alpha values are separated into black and white. You can move it from 1 to 99 to change that separation.

Invert reverses the black-and-white result. Leave it off for the default mapping, or switch it on when you want the result reversed.

No account is needed to try the tool on this page. Downloading more than once or opening it in Fuser asks you to sign up.

Open the tool in Fuser and connect its image result to other nodes in your workflow. This lets you use the generated black-and-white alpha image as a later step.