GeezerVison

You can construct a Blob from an array of "chunks", where each chunk is a string, binary data structure (including Uint8Array), or another Blob.

const arr = new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f]);
const blob = new Blob([arr]);
console.log(await blob.text());
// => "hello"

See Binary Data.