web-feature: <u>

Widely available

The <u> HTML element makes non-textual annotations, styling text as underlined by default.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-09

Servo

Android

2026-09

ArkWeb

HarmonyOS

*

Chrome Browser

Android

18

Safari Browser

iOS

1