Whit Jackson made one that appears to generally be designed employing HTML/Javascript (GitHub url). He also experienced a website where you could generate the addresses client facet, but it surely appears to become down now. BTC addresses use Base58 (like Base64 but without the need of very similar character: IOl0+/) https://tron95295.losblogos.com/28743219/examine-this-report-on-erc20-address-generator