Online Color Image to Grayscale/Black & White Conversion Tool

This online tool allows you to convert your color images into grayscale or black and white images. Upload an image, select the conversion operation you want, click the button, and you'll get the processed image. The processed image can be downloaded and saved. Grayscale images are images that only contain grayscale information. They have no color information, only brightness information. Each pixel contains a shade of gray from black to white. Black and white images further simplify color information, each pixel is pure black or pure white, with no gray in between. By converting color images to grayscale or black and white, you can achieve a retro, artistic effect or a cool black and white effect. The working principle of this tool is that for grayscale conversion, we calculate the brightness value of each pixel's color and then use this brightness value for the new grayscale pixel. For black and white conversion, we use threshold processing, deciding whether the pixel is black or white based on whether the brightness of each pixel exceeds a set threshold, and our algorithm dynamically calculates the threshold for different images to achieve the best conversion effect. This processing method can produce a clear black and white effect, but some details may be lost. This tool is suitable for all types of images, including but not limited to .jpeg, .png, .gif, etc. Bookmark and share this tool~This tool does not upload or save your images to the server, all image processing is done in your browser.