Blob<>JSON

convert-blob.js

// credits: https://stackoverflow.com/questions/27232604/json-stringify-or-how-to-serialize-binary-data-as-base64-encoded-json

// Blob to JSON
const blobToBase64 = (blob) => {
  return new Promise((resolve) => {
    const reader = new FileReader();
    reader.readAsDataURL(blob);
    reader.onloadend = function () {
      resolve(reader.result);
    };
  });
};
(async () => {
  const b64 = await blobToBase64(blob);
  const jsonString = JSON.stringify({blob: b64});
  console.log(jsonString);
})();

// JSON to Blob
const parsed = JSON.parse(jsonString);
const blob = await fetch(parsed.blob).then(res => res.blob());
console.log(blob);