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unix-timestamp.html
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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Timestamp Converter</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
line-height: 1.5;
background-color: #f5f5f5;
color: #333;
padding: 1rem;
min-height: 100vh;
}
.container {
max-width: 500px;
margin: 0 auto;
background: white;
padding: 1.5rem;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
h1 {
font-size: 1.5rem;
margin-bottom: 1.5rem;
color: #1a1a1a;
}
.input-group {
margin-bottom: 1.5rem;
}
label {
display: block;
font-size: 0.875rem;
font-weight: 500;
margin-bottom: 0.5rem;
color: #4a4a4a;
}
input {
width: 100%;
padding: 0.75rem;
font-size: 1rem;
border: 1px solid #ddd;
border-radius: 4px;
transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus {
outline: none;
border-color: #2563eb;
box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.time-display {
margin-bottom: 1rem;
}
.time-display-label {
font-size: 0.875rem;
font-weight: 500;
margin-bottom: 0.5rem;
color: #4a4a4a;
}
.time-display-value {
background-color: #f8f9fa;
padding: 0.75rem;
border-radius: 4px;
font-family: monospace;
font-size: 0.875rem;
word-wrap: break-word;
}
@media (max-width: 480px) {
body {
padding: 0.5rem;
}
.container {
padding: 1rem;
}
input {
font-size: 16px; /* Prevents zoom on mobile */
}
}
</style>
</head>
<body>
<div class="container">
<h1>Timestamp Converter</h1>
<div class="input-group">
<label for="timestamp">Unix Timestamp</label>
<input
type="text"
id="timestamp"
placeholder="Enter Unix timestamp..."
autocomplete="off"
>
</div>
<div class="time-display">
<div class="time-display-label">UTC Time:</div>
<div id="utcTime" class="time-display-value"></div>
</div>
<div class="time-display">
<div class="time-display-label">Local Time:</div>
<div id="localTime" class="time-display-value"></div>
</div>
</div>
<script>
const timestampInput = document.getElementById('timestamp');
const utcTimeDiv = document.getElementById('utcTime');
const localTimeDiv = document.getElementById('localTime');
function formatUTCDate(date) {
return date.toLocaleString('en-US', {
weekday: 'long',
year: 'numeric',
month: 'long',
day: 'numeric',
hour: '2-digit',
minute: '2-digit',
second: '2-digit',
timeZone: 'UTC',
timeZoneName: 'short'
});
}
function formatLocalDate(date) {
return date.toLocaleString('en-US', {
weekday: 'long',
year: 'numeric',
month: 'long',
day: 'numeric',
hour: '2-digit',
minute: '2-digit',
second: '2-digit',
timeZoneName: 'short'
});
}
function updateTimes() {
const timestamp = timestampInput.value.trim();
if (!timestamp) {
utcTimeDiv.textContent = '—';
localTimeDiv.textContent = '—';
return;
}
// Handle both seconds and milliseconds
const ms = timestamp.length <= 10 ? timestamp * 1000 : timestamp;
const date = new Date(Number(ms));
if (isNaN(date.getTime())) {
utcTimeDiv.textContent = 'Invalid timestamp';
localTimeDiv.textContent = 'Invalid timestamp';
return;
}
utcTimeDiv.textContent = formatUTCDate(date);
localTimeDiv.textContent = formatLocalDate(date);
}
timestampInput.addEventListener('input', updateTimes);
// Initialize with current timestamp
timestampInput.value = Math.floor(Date.now() / 1000);
updateTimes();
</script>
</body>
</html>