HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>btoa() — round-trip</title>
</head>
<body>
  <h1>btoa() round-trip</h1>
  <button type="button" id="btn">Encode + decode</button>
  <pre id="out">Waiting...</pre>
  <script>
    document.getElementById("btn").onclick = function () {
      var original = "CodeToFun";
      var encoded = btoa(original);
      var decoded = atob(encoded);
      document.getElementById("out").textContent =
        encoded + "\n" + decoded + "\n" + (decoded === original);
    };
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

JavaScript Window btoa() — round-trip (Try It)