Does grayscale reduce file size?

Sometimes slightly, since color data is simplified, but the main purpose here is the visual effect, not compression — use Compress Image for that.

Can I undo this after downloading?

No — keep your original color file if you might want it again; the grayscale version is a new, separate file.

JPG, PNG, WebP, GIF, and SVG can all be converted to grayscale.

Convert any photo to clean, timeless black and white.

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Processed locally

Your photo never leaves your browser tab.

Clean conversion

A balanced grayscale conversion that preserves detail.

Before/after preview

Compare color and black-and-white side by side.

Reduce image size without losing sharpness.

Resize photos to exact pixels or percentages.

Crop to the perfect frame with live preview.

Convert JPG to PNG or PNG to JPG, automatically.