On-Page SEO Auditor
Run a full on-page audit: meta tags, headings, internal links, images, content length.
A fast on-page audit covering the basics in one pass: title tag, meta description, H1/H2 structure, image alt text, internal vs external linking, content length, structured data, Open Graph tags, canonical URL, and viewport. The tool fetches any public URL server-side, parses the HTML, and returns a checklist with severity tags (error/warning/ok) plus quick stats (word count, link counts, image count). Useful for spot-checking pages before publish, auditing competitor pages, or running through your top 50 URLs to find quick wins. Free and unlimited - no signup. For multi-page audits with prioritization or content-depth analysis, our consulting tier includes that as part of the SEO Audit & Strategy package.
Frequently asked questions
What does 'warning' vs 'error' mean?
Errors block ranking (missing H1, no viewport meta, image with zero alt text). Warnings hurt but don't block (no canonical, missing OG tags, thin content). Fix errors first.
Does this render JavaScript?
No - it parses the raw HTML. Most SEO factors (title, meta, headings, links) are server-rendered and visible in the HTML even on JS-heavy sites. For a JS-rendered audit, use the Lighthouse Score Checker instead.
Why is content length flagged when my page has lots of words?
We measure visible body text, not source HTML. Heavy nav/footer pages can show high word counts in source but low actual content. Aim for 300+ words of unique body content.
Should I audit my whole site with this?
For 1-50 pages, yes. For larger sites, you want a crawler like Screaming Frog. We run sitewide audits as part of the SEO Audit package - book a call to discuss.
Long-form guides on the strategy behind the tool.
What is SEO? A Founder's Definition (2026)
SEO explained for founders: what it is, why it matters, and the easiest path to ranking.
Read guide →SEO for SaaS: A Practical Guide
Practical SEO for SaaS founders - what to do, in what order, with realistic timelines.
Read guide →SaaS SEO Strategy: The Complete Playbook
Build a SaaS SEO strategy from zero: keyword research, content clusters, on-page tactics, and pSEO that compounds.
Read guide →More free SEO tools
Free tools to plan, audit, and ship better SEO pages.
Lighthouse Score Checker
Run a real Google Lighthouse audit on any URL - performance, accessibility, SEO, best practices, and Core Web Vitals.
Schema Markup Generator
Build valid JSON-LD for Article, FAQ, HowTo, Product, LocalBusiness, Organization, and Breadcrumbs.
Heading Structure Analyzer
Audit any page's H1/H2/H3 hierarchy for SEO and accessibility issues.
Want this done for you?
Book a 15-minute call or request a quote. We build 50+ pSEO pages for clients, starting at $300.