Image Grayscale
Convert color images to grayscale or black and white with a single click.
Drop an image here or click to upload
JPG, PNG, WebP, BMP, GIF
Grayscale conversion runs entirely in your browser — images are never uploaded.
Frequently Asked Questions
What is grayscale conversion?
Grayscale removes color, leaving only shades of gray. This tool uses the luminosity method (0.299R + 0.587G + 0.114B) which weights green more heavily, matching how human eyes perceive brightness.
Does it reduce file size?
Grayscale images are often smaller than color ones, but this tool preserves the original format. For additional size reduction, use the Image Compressor afterward.
Is the original image quality preserved?
The conversion is lossless in the sense that no extra compression is applied beyond the output format. PNG output preserves full quality.
Are my images uploaded anywhere?
No. All processing happens locally in your browser using the Canvas API. Your images never leave your device.
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