<h1>-<h6>

The <h1>-<h6> HTML elements represent six levels of section headings. They are some of the most common semantic HTML elements.

Recommendation

It is highly recommended for an email client to support the <h1>-<h6> elements.

Impacts

Accessibility

Assistive technology including screen-readers understand what the <h1>-<h6> represent and are known to make use of them for on-page navigation. Users can jump between headings to quickly scan and navigate the contents of a page.

Resources

• MDN: <h1>–<h6>: The HTML Section Heading elements
• HTML Standard: The h1, h2, h3, h4, h5, and h6 elements

Email client compatibility