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Semantic HTML.

Visible.

Semantic HTML Analyzer

13 HTML5 elements. Green borders show which you’re using. Red X marks which you’re missing.

One click reveals your page structure.

example.com/blog/post
<header>
8/13
<nav>
<main>
<article>
<aside>
<footer>

Checks 13 Semantic Tags

World First Browser OS

Launch from Quick Launch

150+ Tools

Why Semantic HTML
Matters for SEO

Search engines don’t just read your content. They read your structure.

HTML5 introduced 13 semantic elements that tell browsers and search engines exactly what each section of your page means.

<header>

✓
1 found

<nav>

✓
2 found

<main>

✓
1 found

<article>

✗
not found

<section>

✓
4 found

<aside>

✗
not found

<footer>

✓
1 found

<figure>

✗
not found

<figcaption>

✗
not found

<time>

✗
not found

<address>

✗
not found

<mark>

✗
not found

<details>

✗
not found

Google uses these to understand content hierarchy. Screen readers use them for accessibility. You should use them to structure your pages.

This tool shows you exactly which ones you are using and which you are missing. Green borders highlight found elements. Red X marks the gaps. Semantic structure is one layer. The other eight Technical SEO Tools cover schema, links, speed, and crawl rules.

Part of the
Technical SEO Toolkit

Tools that work together in the Technical SEO toolkit.

Broken Link Checker →

Dead links kill SEO. Find them before Google does. Red borders. Clickable sidebar. Fixed in minutes.

Domain Authority Checker →

Skip the copy-paste. Click once. MOZ opens with the current site's domain authority.

PageSpeed Insights →

Every other tool tests one page at a time. Run up to 25 simultaneous tests via the official Google PSI API - multiple URLs, multiple runs, all a.

Redirect Tracer →

One wrong redirect costs you rankings. A 302 instead of a 301. A chain four hops deep. An HTTPS downgrade buried in the middle.You'd never know.

Robots.txt Checker →

Is this page blocked? One click fetches robots.txt, parses every rule, tells you if the current URL is allowed.

Structured Data Tester →

One click extracts all JSON-LD. See exactly what Google sees. Visualize schema as interactive nodes.

Wayback Machine Checker →

Check what any page looked like last year. Last month. Last decade. No copy-pasting URLs.

Website Tracker Detector →

Google Analytics. Facebook Pixel. HotJar. LinkedIn Insight. See what marketing tools any website is running.

XML Sitemap Validator →

Four common sitemap locations. Checked in seconds. Green means found. Grey means missing.