Convert any image to
greyscale, instantly.
Free, browser-based, zero uploads. Your image never leaves your device. Supports JPG, PNG, WebP, and GIF.
Drop your image here
or click to browse files
JPG · PNG · WEBP · GIF
Original
Greyscale
How it works
This tool uses the HTML5 Canvas API to desaturate your image entirely in your browser. We calculate a weighted average of each pixel's RGB channels — giving more weight to green (as the human eye is most sensitive to it) — producing a natural-looking black and white result.
No files are sent to any server. Everything happens locally on your device, instantly.
Why convert to greyscale?
- Classic, timeless aesthetic for portraits and photography
- Reduce file complexity for print or document use
- Analyse image contrast and lighting without colour distraction
- Prepare images for ink-saving black & white printing
Is this tool free?
Yes, completely free with no limits on how many images you convert.
Does my image get uploaded anywhere?
No. Conversion happens entirely in your browser using JavaScript. Your image never leaves your device.
What file formats are supported?
Any image format your browser supports: JPG, PNG, WebP, GIF, BMP, and more. Output is always a high-quality PNG.
What's the difference between greyscale and black & white?
Greyscale preserves the full range of tones from black to white, including all the mid-greys. Pure black & white (1-bit) reduces everything to just two values. This tool produces greyscale.
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