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Paste HTML, CSS, and JavaScript, then preview the page instantly in a sandboxed iframe with runtime errors and console output.

Last updated: 2026-05-30

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HTMLCSS

:root {
    color-scheme: light;
    font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at top left, #dbeafe, transparent 34rem),
        linear-gradient(135deg, #f8fafc, #eef2ff);
    color: #0f172a;
}

.workspace {
    width: min(680px, calc(100vw - 40px));
    border: 1px solid rgba(37, 99, 235, 0.16);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 0 24px 80px rgba(37, 99, 235, 0.18);
    padding: 42px;
}

.eyebrow {
    margin: 0 0 12px;
    color: #2563eb;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(32px, 7vw, 58px);
    line-height: 1.04;
}

.lead {
    color: #475569;
    font-size: 18px;
    line-height: 1.8;
}

button {
    border: 0;
    border-radius: 12px;
    background: #2563eb;
    color: white;
    cursor: pointer;
    font-size: 16px;
    font-weight: 800;
    padding: 14px 22px;
}

#status {
    color: #16a34a;
    font-weight: 700;
}

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