Add the missing viewport meta tag

Perfect on a laptop. Zoomed out and tiny on a phone.

BeginnerRead 2 minDoing: 20 minutes5 steps

What you'll have at the end

A page that renders at the real device width instead of a shrunk-down desktop layout

Before you start

You need

A web page you can edit, with an HTML head section, and a way to preview it at a phone-sized screen width.

Not covered

Tracking down which specific element is causing a sideways scrollbar once the tag itself is already correct.

Leans on

Finding the element causing a horizontal scrollbar on mobile

If the page still scrolls sideways after this tag is confirmed correct, use this to hunt down the specific overflowing element causing it.

Checked 20 Aug 2026