Grayscale Image

No — the tool runs entirely in your browser using the Canvas API. Your image is loaded, converted and downloaded on your own device — it is never sent to a server, logged or stored. That makes it safe for private or sensitive photos, and it keeps working offline once the page has loaded. Closing the tab clears everything.

Grayscale keeps the full range of gray tones between black and white, so the image looks like a classic black-and-white photograph with smooth shading. True black and white — sometimes called a threshold or 1-bit effect — keeps only pure black and pure white with no grays in between, which gives a stark, high-contrast, stencil-like look. Choose Grayscale for photos and Black & white for line art, signatures or a bold graphic effect.

Invert flips every color to its opposite, turning the image into a photographic negative — light areas become dark and each color becomes its complement. It is handy for previewing film negatives, creating a dark-mode version of a diagram, checking a design's contrast, or just making an eye-catching effect. Inverting a second time returns the original colors.

When Black & white is selected, a threshold slider appears. Every pixel is first measured for brightness, then anything brighter than the threshold becomes white and anything darker becomes black. Lower the threshold to keep more of the image white and raise it to make more of it black, so you can dial in exactly where the cutoff falls for text, line art or a high-contrast photo.

JPG, PNG, WebP, GIF and BMP are all accepted as input. You can export the result as PNG (lossless, best for screenshots and graphics), JPG (smallest for photos) or WebP. Animated GIFs are flattened to their first frame, like any canvas-based tool.