Convert an image to black and white

For creators and technicians preparing a mask, simplifying an asset or comparing threshold settings.

Separate image tones at a precise threshold and get a strictly black-and-white result suited to a mask, stencil or graphic effect.

How to use

Load a PNG, JPEG or WebP image that you want to turn into strict black and white.
Set the threshold to decide which brightness values become black and which become white.
Run the treatment and check whether important shapes remain readable in the binary result.
If the result looks too harsh, return to the original and try another threshold before downloading.

Example

An illustrator prepares a stencil from a photo. They raise the threshold step by step until silhouettes look clean, then check that small elements have not disappeared before using the file as a mask.

Limits and formats

The output is binary: it keeps no greys, so fine details can be lost.
A poorly chosen threshold turns light areas white or shadows into solid black.
PNG, JPEG and WebP images are accepted, but noise or compression can make edges less clean.
Check the result at the intended display size, because a detail visible large may vanish small.
The tool does not offer a contrast pre-adjustment; the threshold acts directly on the tones.

Where processing happens

The black-and-white conversion runs in the browser. Your image is not transmitted outside and remains available on your device during testing. No account is required to try several thresholds. Nothing is stored after you close the page, so the test remains private.

Frequently asked questions

How do I choose the right threshold?

Start with a middle value, then move it in small steps while watching the essential areas. If details disappear, go back. The best threshold depends mainly on your image contrast and the intended use. A quick visual check is often more useful than a perfect number.

Why is my result too black or too white?

The threshold separates tones abruptly. If the image lacks contrast or the threshold is badly placed, a large part flips to one side. Try another setting or begin with a more balanced image.

Can I get greys instead of black and white?

No, this tool aims for a strictly binary result suited to masks and graphic effects. For greyscale, use a different converter that preserves intermediate shades. If you need shades of grey, choose a dedicated greyscale converter instead.