Grayscale Image Converter
Turn a colour photo into black-and-white with a before/after compare view.
Select or Drag Image
Secure local conversion - 100% private, no data leaves your browser
This converter strips the colour out of an image and leaves the brightness, giving you a black-and-white version you can compare side by side with the original before downloading. It draws the photo to a canvas and recomputes every pixel in your browser, so nothing is uploaded. Grayscale is useful for a timeless look, for print that will not run in colour, and for checking whether a design holds up on tone alone.
Grayscale is about brightness, not just “removing colour”
Converting to grayscale keeps each pixel's luminance — how light or dark it is — and discards its hue. That matters because two very different colours can share the same brightness and end up the same grey, so a bold colour contrast can flatten into mush in black-and-white. The compare view is there for exactly this: flip between colour and grayscale to check that the important edges still separate once the colour is gone.
A quick accessibility and design check
Viewing a layout in grayscale is a classic test: if text or a chart is only legible because of colour, it falls apart in grayscale — and that is roughly what a colour-blind viewer or a black-and-white printout sees. If your image still reads clearly here, its contrast is doing the work rather than colour alone, which is a good sign for accessibility. Removing colour is one-way, so keep your original if you may want the colour version back.
Frequently Asked Questions
What does the compare view show?
It lets you flip between the original colour image and the grayscale result so you can check that important edges and detail still stand out once the colour is gone.
Why do two different colours look the same grey?
Grayscale keeps brightness and drops hue, so colours with similar lightness map to a similar grey. That is why a strong colour contrast can flatten out in black-and-white.
Can I get the colour back afterwards?
Not from the grayscale file — the colour information is discarded. Keep your original image if you might want the colour version later.
Is the photo uploaded?
No. The conversion runs on a canvas in your browser and the result is downloaded locally.