--- title: "Page doesn't have exactly one visible

in the server HTML (seo/h1-count)" description: "seo/h1-count: Google uses the first visible h1 as a title-link source and Bing expects the h1 to reflect the title; agents and Markdown converters use…" canonical: https://void-design.vercel.app/rules/seo/h1-count lastModified: 2026-09-16 --- # Page doesn't have exactly one visible

in the server HTML `seo/h1-count` · severity **error** · category SEO · detected by `void seo` and `void audit` ## Why it matters Google uses the first visible h1 as a title-link source and Bing expects the h1 to reflect the title; agents and Markdown converters use it as the document title. ## How to fix it Render one

per page on the server, describing the page topic. Use h2–h6 for sections and don't put the logo in an h1. ## References - https://developers.google.com/search/docs/appearance/title-link - https://about.ads.microsoft.com/en/blog/post/october-2025/optimizing-your-content-for-inclusion-in-ai-search-answers ## More seo rules `void seo` reports 60 rules in this category. What search engines need from the raw response: status codes, titles and descriptions in , self-referencing canonicals, one h1, crawlable links, Open Graph, icons, robots.txt and a sitemap with real dates. - `canonical-broken` Canonical points to a URL that returns 4xx/5xx — [seo/canonical-broken](https://void-design.vercel.app/rules/seo/canonical-broken) - `canonical-conflict` Canonical target redirects, is noindex, or canonicalises elsewhere — [seo/canonical-conflict](https://void-design.vercel.app/rules/seo/canonical-conflict) - `canonical-not-self` Canonical points to a different URL — [seo/canonical-not-self](https://void-design.vercel.app/rules/seo/canonical-not-self) - `head-js-mutation` JavaScript changes canonical, robots, title or description after load — [seo/head-js-mutation](https://void-design.vercel.app/rules/seo/head-js-mutation) - `h1-title-mismatch`

and share little wording — [seo/h1-title-mismatch](https://void-design.vercel.app/rules/seo/h1-title-mismatch) - `heading-skip` Heading levels skip (h2 → h4) or headings are empty — [seo/heading-skip](https://void-design.vercel.app/rules/seo/heading-skip) - `img-alt-missing` <img> without an alt attribute — [seo/img-alt-missing](https://void-design.vercel.app/rules/seo/img-alt-missing) - `img-alt-quality` Alt text is a filename, a generic word, or overly long — [seo/img-alt-quality](https://void-design.vercel.app/rules/seo/img-alt-quality) Detected by `void seo` and `void audit`. Explain it in a terminal: `void rules seo/h1-count`