Convert image to black and white
Create a strictly black-and-white image with an adjustable luminance threshold.
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Create a strictly black-and-white image with an adjustable luminance threshold. Move the threshold to control which pixels become black or white. Move the luminance threshold to decide which pixels become pure black and which become pure white. The source file remains unchanged and all processing runs locally in your browser.
Why use this tool
- Tune the threshold while checking fine lines and large light or dark areas.
- Produce a two-tone result with no intermediate gray pixels.
- Preview and process the file locally without sending it to an image server.
How it works
- Choose a JPG, PNG or WebP image and check the preview.
- Tune the threshold while checking fine lines and large light or dark areas.
- Apply the operation and download the result in the source format.
How the operation works
Pixels at one side of the selected luminance threshold become black and those at the other side become white.
A high or low threshold can remove subtle detail; this operation is deliberately different from grayscale.
Complementary image tools
Private by design
Your files stay on your device. Processing starts only when you choose an image, and nothing is stored on our servers.
Frequently asked questions
Are my images uploaded?
No. Processing happens locally in your browser, so your image files never leave your device.
Which image formats are supported?
The tool accepts JPG, PNG and WebP images and preserves transparency when the selected output supports it.
What does the black-and-white threshold control?
Pixels at one side of the selected luminance threshold become black and those at the other side become white.
Are any gray tones kept in the result?
A high or low threshold can remove subtle detail; this operation is deliberately different from grayscale.
Does black-and-white conversion change my original file?
No. The browser creates a new downloadable result and leaves the selected source file unchanged.
Can I use this tool on a phone?
Yes. Use a current mobile browser that can select a JPG, PNG or WebP file and save downloads.
Which image formats are accepted?
You can use JPG, PNG and WebP. Border and Round export PNG; the other operations keep the input format.
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