Sometimes, we want to convert uint8 array to base64 encoded string with JavaScript.
In this article, we’ll look at how to convert uint8 array to base64 encoded string with JavaScript.
How to convert uint8 array to base64 encoded string with JavaScript?
To convert uint8 array to base64 encoded string with JavaScript, we can use the FileReader constructor.
For instance, we write
const base64Arraybuffer = async (data) => {
const base64url = await new Promise((r) => {
const reader = new FileReader();
reader.onload = () => r(reader.result);
reader.readAsDataURL(new Blob([data]));
});
return base64url.split(",", 2)[1];
};
//...
await base64Arraybuffer(new Uint8Array([1, 2, 3, 100, 200]));
to define the base64Arraybuffer function that returns a promise with the blob that we convert from the data the Uint8Array into a base64 string.
We create the reader FileReader object and then call readAsDataURL with the blob value to read the blob into a base64 string.
Then we call r with reader.result to return the reader.result base64 string as the resolve value.
Then we call base64Arraybuffer in an async function with a Unit8Array as its argument to read it into a base64 string.
Conclusion
To convert uint8 array to base64 encoded string with JavaScript, we can use the FileReader constructor.
