Preview and Viewports

Desktop: 1440 x 900
Tablet: 834 x 1194
Mobile: 390 x 844

Use live preview, viewport presets, and responsive mode.

The preview panel renders your HTML, CSS, JS, and Data inside a sandboxed iframe. It updates as you edit.

Viewport Presets

Use the viewport switcher to preview common device sizes:

The preview scales down to fit the available space without upscaling, so you see accurate proportions.

When no viewport is selected, the preview fills all available space. This is useful for fluid layouts and quick checks.

Click Refresh in the toolbar to force a clean rebuild of the preview and clear console logs.