Answers for "string convert to base 64 image in react native"

display image base64 in REACT NATIVE

const encodedBase64 = 'R0lGODlhAQABAIAAAAAA...7';
<Image source={{uri: `data:image/gif;base64,${encodedBase64}`}} />

react native base64 encode

const Buffer = require("buffer").Buffer;
let encodedAuth = new Buffer("your text").toString("base64");