Convert Image to Grayscale — Free Online Tool
Strip colour from any image and convert it to black and white (grayscale) instantly. Perfect for creating dramatic photos, reducing file size, or preparing images for print.
Drop file here or click to browse
Files stay on your device · Up to 200 MB
Drop multiple files or click to browse
Select multiple files · Up to 200 MB each
Processing…
Done!
How to Use Grayscale Image
Why Use Our Grayscale Image Tool?
Grayscale images have fewer data channels and often compress smaller than colour equivalents. They're also classic for artistic photography, document scanning output, and print-ready assets.
Frequently Asked Questions
Slightly — grayscale images have one channel vs three for colour, but most web formats bundle them similarly. PNG grayscale can be noticeably smaller.
No — once colour data is removed, it cannot be recovered. Keep a copy of the original.
We use the luminance formula: 0.299R + 0.587G + 0.114B, which matches human visual perception.
Currently full conversion only.