Audit your page's SEO in seconds.
Paste your page's HTML source and get instant analysis of title tags, meta descriptions, headings, images, links, and structured data.
What Is On-Page SEO?
On-page SEO is the practice of optimizing the content and HTML of a single page so search engines and AI answer engines can understand, rank, and cite it. It covers the title tag, meta description, heading hierarchy, image alt text, canonical tag, Open Graph tags, and structured data. The auditor above checks each of these in your pasted HTML and grades the page.
It is distinct from technical SEO, which is site-wide: crawlability, sitemaps, robots.txt, and speed. A page can have flawless on-page signals and still struggle if the site cannot be crawled, so the two work together. Our SEO glossary entry covers how the pieces fit, and the meta tag generator helps you write the title and description this auditor checks.
When a Paste-In Check Is Not Enough
This free tool audits one page's HTML in your browser, which is perfect for a fast check while you write or edit. It cannot see what only a live crawl reveals: how the page actually renders, whether search and AI crawlers can reach it, how it performs on real Core Web Vitals, and whether it shows up in answer engines like ChatGPT and Perplexity.
That is what Mavek's live SEO and AEO audit covers. It is a paid, human-led review of your real site with a prioritized roadmap, and as of June 2026 it checks AI search visibility alongside traditional rankings. Use this free checker for quick on-page fixes, and book the live audit when you want the full picture. The ongoing SEO and AEO service keeps it handled after that.
On-Page SEO Questions, Answered
What is a website SEO checker?
A website SEO checker analyzes a page's HTML and reports on the on-page factors that influence search rankings: the title tag, meta description, heading structure, image alt text, canonical tag, Open Graph tags, and structured data. The auditor above does this instantly in your browser. You paste a page's HTML source and it returns a score with specific issues to fix.
How do I check my on-page SEO?
Open your page, view its source (right-click then View Page Source, or Cmd/Ctrl+U), copy the HTML, and paste it into the auditor above. It checks your title length, meta description, H1 and heading hierarchy, image alt coverage, canonical tag, Open Graph tags, and structured data, then grades the page and lists what to improve.
What does a good on-page SEO score look like?
A strong page has exactly one H1, a title tag between 30 and 60 characters, a meta description between 70 and 155 characters, alt text on every meaningful image, a self-referencing canonical tag, Open Graph tags for social sharing, and valid structured data. The auditor flags each of these so you can see which are missing.
Is this on-page SEO checker free?
Yes, completely free and with no signup. It runs entirely in your browser, so the HTML you paste never leaves your device. For a deeper review of a live site, including AI search visibility and a prioritized roadmap, Mavek offers a paid live audit at /seo-audit.
Does on-page SEO still matter in 2026?
Yes. As of June 2026, clean on-page signals matter for both Google rankings and AI answer engines like ChatGPT and Perplexity, which lift self-contained passages from well-structured pages. Clear titles, correct heading hierarchy, and valid structured data help both kinds of engines understand and cite your page.
What is the difference between on-page and technical SEO?
On-page SEO covers the content and HTML signals on a single page: titles, headings, copy, images, and metadata. Technical SEO covers site-wide infrastructure: crawlability, sitemaps, robots.txt, page speed, and indexing. This auditor focuses on on-page factors; a full audit covers both.
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