Grayscale Image Converter
Turn a photo black and white with the luminosity, average or lightness method and adjustable intensity.
Give your photos a timeless look
Black and white photos emphasise emotion, texture and light. Portraits, street photography and architecture often look more striking in grayscale. This tool converts your colour photo in seconds.
Three methods
- Luminosity: weights green more than red and blue, matching how the eye perceives brightness for the most natural result
- Average: a simple average of the three colour channels
- Lightness: the average of the brightest and darkest channel
Partial colour effect
Lower the intensity for a desaturated, slightly coloured look instead of full gray. Processing happens at full resolution in your browser.
How to use Grayscale Image Converter
- Upload the photo to convert.
- Choose the conversion method.
- Adjust the intensity and preview the result.
- Download the black and white photo.
Why use this tool?
Get a professional grayscale conversion without installing an editing app; your photo stays on your device.
FAQ
Which method should I use?
Luminosity gives the most natural result for photos. Average and lightness are simpler formulas and can look flatter.
Can I colourise a black and white photo again?
The original colours won't return, but the AI Photo Colorizer can add estimated colours.
Does the file size change?
It usually shrinks a little because there is less colour information.
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