web-feature: <h1> through <h6>

baseline logo Widely available

The <h1> through <h6> HTML elements represent six levels of section headings, in order of decreasing importance.

WKWebView

macOS

*

iOS

*

Android WebView

Android

*

WebView2

Windows

*

WPE MiniBrowser

Linux

2026-04

Servo

Android

2026-04

Chrome Browser

Android

18

Safari Browser

iOS

1

Notes

Support data provided by: BCD logo

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This feature was last updated on April 19, 2026.