games/tools/Base64/index.html

<h1>Encode/decode data to base64</h1>
<form>
    <label>Input data</label><br>
    <textarea value="" rows="6" cols="80" id="input" required></textarea><br>
    <button type="button" onclick="doencode();">Encode</button>
    <button type="button" onclick="dodecode();">Decode</button><br>
    <label>Output</label><br>
    <textarea id="output" rows="6" cols="80" readonly></textarea><br>
    <button type="button" id="copy" onclick="docopy();">Copy</button>
</form>

<script>
function docopy() {
    document.getElementById("output").select();
    document.execCommand('copy');
}

function doencode() {
    var output = btoa(document.getElementById("input").value)
    document.getElementById("output").value = output;
}
function dodecode() {
    var output = atob(document.getElementById("input").value)
    document.getElementById("output").value = output;
}
</script>