<!DOCTYPE html>
<html lang="en-US">
<body>
<h1>JSON Convert all keys to lowercase</h1>
<button onclick="myFunction()">Click Me</button>
<script>
var data = [
{
"name": "Mike",
"age": 36
},
{
"NAME": "Jade",
"AGE": 24
}
];
function myFunction(){
for(var i = 0; i < data.length; i++){
for (var key in data[i]) {
if(key.toLowerCase() !== key){
data[i][key.toLowerCase()] = data[i][key];
delete data[i][key];
}
}
}
console.log(data);
}
</script>
<p><strong>Note</strong>: Click on the button and check your console</p> </body>
</html>