Enter label / value / color, pick a style (flat, flat-square, plastic, for-the-badge, social), optionally add a logo using a Simple Icons slug (e.g. javascript, react, github, typescript). The preview fetches the badge live from shields.io. Copy URL gives a direct link; Copy Markdown gives  ready for your README; Download SVG fetches the vector and saves it locally. Color can be a named preset (brightgreen, green, yellow, orange, red, blue, lightgrey, success, important, critical, informational, inactive, blueviolet, ff69b4, 9cf) or any hex like #4f8cff.