HTML Viewer Full Screen
View your HTML project full screen with HCODX. Run the preview in a separate tab, expand it with your browser and test the page without editor panels.
Open the HTML preview without editor panels
A full screen HTML viewer gives your rendered page more room when you want to inspect a layout or demonstrate an interaction.
Start in the editor with your HTML entry file and its related CSS, JavaScript and images. HCODX provides a separate preview shell at preview.hcodx.io. The Run in New Tab control opens project output away from the editing interface, so the file tree, toolbar and code panes no longer share the available page width. This is useful for reviewing a complete screen or walking through a small front-end demonstration.
Opening a preview tab and entering fullscreen are separate actions. The first removes the editor panels from your view; the second uses the browser’s own fullscreen mode to hide its surrounding interface where supported. On many desktop browsers F11 toggles fullscreen. On other devices, use the browser menu or platform shortcut. Exit fullscreen with the browser control when you need to return to your other tabs.
See a wide layout
Review a dashboard, gallery or navigation bar using the preview tab’s actual available width.
Demonstrate an interaction
Click through your page without exposing the source panels during the demonstration.
Keep source nearby
Leave the editor tab open so you can return to the project, change a file and run the updated result.
View HTML full screen in HCODX
Prepare the project in the editor before expanding the preview.
A development preview is not a published website address. Keep a downloaded project copy and deploy the files separately when you want a durable public site.
Check how much room your page really has
Use viewport dimensions to distinguish a larger preview from browser zoom.
This example displays the inner width and height of the document. Open it in a new preview tab and toggle browser fullscreen. The numbers report the viewport available to the page in CSS pixels, rather than the physical pixel resolution of your monitor.
A CSS breakpoint reacts to viewport conditions. If a navigation bar changes after you expand the window, that may be your media query working correctly. Browser zoom can also change the effective CSS pixel width, so keep zoom consistent when comparing two renders.
<output id="size"></output>
<script>
function showSize() {
document.getElementById("size").textContent =
`${window.innerWidth} × ${window.innerHeight} CSS pixels`;
}
window.addEventListener("resize", showSize);
showSize();
</script>Full screen, split preview or mobile preview?
Choose a viewing mode for the question you need to answer.
Full screen for a complete presentation
Use a separate preview tab when you need the rendered output to occupy the screen. This gives you room to inspect broad layouts and demonstrate interactions.
Split preview for small source edits
Keep source and output beside each other when adjusting a selector, changing text or testing a short event handler. That reduces switching during frequent edits.
Mobile preview for narrow layouts
A fullscreen desktop window does not simulate a phone. Use the responsive preview controls for smaller widths, then verify touch and browser behavior on a real device.
Full screen HTML preview questions
Give your HTML project the whole screen
Open your project, run it in a separate tab and expand the browser preview.
Instant HTML Runner & Viewer with Live Preview
Need to run a short HTML, CSS and JavaScript snippet? The HTML Runner Online has a focused editing surface with live output.
Open HTML Runner Online