save.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Base64 to File Converter</title>
    <style>
        body {
            margin: 20px;
            font-family: Arial, sans-serif;
        }
        textarea {
            width: 100%;
            height: 300px;
            margin-bottom: 10px;
        }
        button {
            padding: 10px 20px;
            font-size: 16px;
        }
    </style>
</head>
<body>
    <h2>Base64 to File Converter</h2>
    <textarea id="base64Input" placeholder="Paste base64 encoded text here..."></textarea>
    <button onclick="processBase64()">Convert and Download</button>

    <script>
        async function processBase64() {
            try {
                const base64Input = document.getElementById('base64Input').value.trim();
                if (!base64Input) {
                    alert('Please paste base64 encoded text first!');
                    return;
                }

                // Convert base64 to byte array
                const binaryString = atob(base64Input);
                const bytes = new Uint8Array(binaryString.length);
                for (let i = 0; i < binaryString.length; i++) {
                    bytes[i] = binaryString.charCodeAt(i);
                }

                // Create a blob from the byte array
                const blob = new Blob([bytes]);

                // Create a readable stream from the blob
                const readableStream = blob.stream();

				const decompressedStream = readableStream.pipeThrough(new DecompressionStream('gzip'));
				const decompressedResponse = new Response(decompressedStream);
				const decompressedBlob = await decompressedResponse.blob();
				
				const urlObject = window.URL || window.webkitURL || window;
				const save_link = document.createElement('a');
				save_link.href = urlObject.createObjectURL(decompressedBlob);
				save_link.download = 'client.html';
				save_link.click();

            } catch (error) {
                console.error('Error processing file:', error);
                alert('Error processing file: ' + error.message);
            }
        }
    </script>
</body>
</html>