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base64.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Base64</title>
<link rel="stylesheet" type="text/css" href="main.css">
<style>
.split {
margin-top: 0.5em;
}
textarea {
font-family: monospace;
}
</style>
</head>
<body>
<header>
<h1><a href="index.html">Tools</a></h1>
</header>
<main>
<header class="bar">
<h2>Base64</h2>
</header>
<textarea placeholder="Type something..." rows="10" cols="50"></textarea>
<div class="split">
<button onclick="encode()">Encode</button>
<button onclick="decode()">Decode</button>
</div>
<noscript>
<small>This tool requires Javascript to work.</small>
</noscript>
</main>
<script>
const textarea = document.querySelector("textarea");
function encode() {
const encoded = encode64(textarea.value);
textarea.value = encoded;
}
async function decode() {
try {
const decoded = decode64(textarea.value);
textarea.value = decoded;
} catch(e) {
alert("Error: invalid base64 input.");
}
}
function encode64(input) {
return btoa(unescape(encodeURIComponent(input)));
}
function decode64(input) {
return decodeURIComponent(escape(window.atob(input)));
}
</script>
<script src="//instant.page/5.2.0" type="module" integrity="sha384-jnZyxPjiipYXnSU0ygqeac2q7CVYMbh84q0uHVRRxEtvFPiQYbXWUorga2aqZJ0z"></script>
</body>
</html>