blob to base64 converstion javascript

Question

I am trying to parse blob object into base64 string in javascript. Please help. my code is

var reader = new FileReader();

reader.addEventListener("loadend", function () {
    // reader.result contains the contents of blob as a typed array
    var buffer = reader.result;
    var view = new Uint8Array(buffer);
    var binary = String.fromCharCode.apply(window, view);
    var base64 = btoa(binary);
    cb(base64);
    console.log(base64);
}); 

reader.readAsArrayBuffer(data.blob);

So what is the error you are facing?

Souvik Ghosh
– Souvik Ghosh

2017-06-19 11:38:40 +00:00
Commented Jun 19, 2017 at 11:38 — Souvik Ghosh
– Souvik Ghosh, Commented Jun 19, 2017 at 11:38
Uncaught RangeError: Maximum call stack size exceeded

Fahad Farooqi
– Fahad Farooqi

2017-06-19 11:42:40 +00:00
Commented Jun 19, 2017 at 11:42 — Fahad Farooqi
– Fahad Farooqi, Commented Jun 19, 2017 at 11:42
Does this answer your question? Convert blob to base64

Elias Holzmann
– Elias Holzmann

2022-02-01 22:11:30 +00:00
Commented Feb 1, 2022 at 22:11 — Elias Holzmann
– Elias Holzmann, Commented Feb 1, 2022 at 22:11

yemiOdetola · Accepted Answer · 2019-11-04 20:55:56Z

6

You may try this-

var blob = //your blob data;

var reader = new FileReader();

reader.readAsDataURL(blob); 
reader.onloadend = function() {
    var base64data = reader.result;                
    console.log(base64data);
    return;
}

Refer- Convert blob to base64

edited Nov 4, 2019 at 20:55

yemiOdetola

5695 silver badges13 bronze badges

answered Jun 19, 2017 at 12:04

Souvik Ghosh

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