If you're looking to add some color to a black and white photo online for free, there are several tools and websites available that use AI algorithms to do so. One such website is img2go.com, which uses deep learning to colorize black and white images. Simply upload your photo, and the AI will automatically add natural and realistic colors to it, all within a matter of seconds.
Another option is Fotor, an online photo editing tool that features an AI photo colorizer. With just one click, Fotor's AI can automatically colorize black and white photos. The website also provides easy-to-use editing tools to adjust the brightness, contrast, warmth, and shadows of the photo. Additionally, there are various filters available to give your colorized photo a dramatic, whimsical, or retro look. Other websites that offer free online colorization include PicWish, Canva, and Playback.fm. Simply upload your black and white photo, and let the AI work its magic to add colors and give new life to your old photos.