在线Base64编码解码工具

<script type='text/javascript'>
	function encodeFile() {
		var file = document.getElementById('file').files[0];
		var reader = new FileReader();

		reader.onload = function() {
			var encoded = btoa(reader.result);
			document.getElementById('encoded').value = encoded;
		};

		reader.readAsBinaryString(file);
	}

	function decodeFile() {
		var encoded = document.getElementById('encoded').value;
		var decoded = atob(encoded);
		document.getElementById('decoded').value = decoded;
	}
</script>