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Convert an uint8 array to a base64 encoded string

JavaScript version

const uint8ToBase64 = (arr) =>
  btoa(
    Array(arr.length)
      .fill("")
      .map((_, i) => String.fromCharCode(arr[i]))
      .join("")
  );

// For Node.js
const uint8ToBase64 = (arr) => Buffer.from(arr).toString("base64");

TypeScript version

const uint8ToBase64 = (arr: Uint8Array): string =>
  btoa(
    Array(arr.length)
      .fill("")
      .map((_, i) => String.fromCharCode(arr[i]))
      .join("")
  );

// For Node.js
const uint8ToBase64 = (arr: Uint8Array): string =>
  Buffer.from(arr).toString("base64");

See also

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