Which grayscale formula is used?

Luminance-weighted: 0.299R + 0.587G + 0.114B — matches human perception.

Image Grayscale Converter

Convert any image to black and white (grayscale) in your browser. Download as PNG. Nothing is uploaded.

By AbraCalc Editorial Team · Reviewed by AbraCalc Methodology Review · Last reviewed: 2026-06-25

Choose an image

Choose an image to convert to grayscale.

Pure browser JavaScript (HTML canvas) — no upload.

Embed this tool on your site

<iframe src="https://abracalc.com/app/image-grayscale/" width="100%" height="640" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Choose an image.
The grayscale preview appears automatically.
Click Download grayscale.

Convert any image to black and white (grayscale) in your browser. Download as PNG. Nothing is uploaded.

Frequently asked questions

Which grayscale formula is used?: Luminance-weighted: 0.299R + 0.587G + 0.114B — matches human perception.

Image Grayscale Converter

How to use this tool

Frequently asked questions

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