SeoStratum — free website SEO audit tool

Free website SEO audit: every page gets a score, every issue gets a fix

Paste any URL and get a free website SEO audit you can act on: a score, the strengths of the page, every issue ranked by severity and the concrete fix for each one. No installation, no configuration — most reports are ready in under 30 seconds.

What the free SEO audit checks

Each scan inspects the on-page and technical factors that decide whether a page is able to rank:

  • Meta tags: title length and relevance, meta description, canonical URL and robots directives
  • Content structure: exactly one H1, a logical H2/H3 hierarchy and enough unique text
  • Internal linking: crawlable anchors that spread authority across the site
  • Images: descriptive alt text and modern formats such as WebP or AVIF
  • Indexability: status codes, redirects, robots.txt and sitemap.xml
  • Structured data: valid JSON-LD for Organization, WebSite and WebApplication
  • Performance: response time, page weight and compression at fetch time — plus live Core Web Vitals (LCP, INP, CLS) with Pro
  • Security and mobile usability: HTTPS, viewport and tap-target sizing

How the audit works

The audit analyzes a single URL at a time — a homepage, a landing page or an individual article — not an entire domain at once; to audit more pages of a site, scan each URL you care about.

  1. Enter the URL you want to analyze: a homepage, a landing page or a single article.
  2. The crawler fetches the page and evaluates more than 20 ranking factors.
  3. You get a prioritised report — critical issues first, then warnings — each with its own fix.

Create a free account to run the audit: paste the URL and the crawler starts within seconds. Audits are unlimited, every report is saved in your account so you can compare a page before and after an edit, and no card is required — Pro adds AI analysis, Core Web Vitals and monitoring when it launches.

Why teams use SeoStratum

Most tools tell you that something is wrong; SeoStratum tells you what to change and why it matters, in plain language. The free plan includes unlimited audits with no credit card, and saved reports stay in your account so you can compare a page before and after an edit. Every finding links back to the check that produced it, so you always know where the number in your score comes from.

Plans and pricing

  • Free — $0. Unlimited full audits, no credit card and no trial countdown. Every report includes the score, every issue ranked by severity and the fix for each one; the history keeps your last 10 reports.
  • Pro — $4.99 per month (launching soon). Adds AI analysis on every audit, Core Web Vitals with real PageSpeed data, reports in 6 languages, recurring monitoring of tracked domains, multi-page audits, branded PDF export and extended history. Join the waitlist from the pricing section to be notified at launch and keep the founding-member discount.

What a report looks like

Every scan returns the same structure you can see in the example below: an overall score with a letter grade, the page's strengths, then each issue ranked critical → warning → passed, with the concrete fix written next to it.

Example SeoStratum audit report showing an overall score of 72 (grade C) with a critical missing-canonical issue, a title-length warning and a passed meta description check

Frequently asked questions

Is the SEO audit really free? Yes. Free audits are unlimited — no credit card and no trial countdown. Create a free account to run and save your reports. Pro ($4.99/month, launching soon) adds AI analysis, Core Web Vitals, reports in 6 languages, monitoring and PDF export.

Do I need to install anything? No. There is nothing to install on your site: the crawler fetches the URL server-side and the report appears in your dashboard.

How long does a scan take? Most pages return a full report in under 30 seconds. Pages that respond slowly to the initial fetch can take a little longer, and the report shows that response time as one of its findings. With Pro, live Core Web Vitals from PageSpeed Insights are added to the report.

Does it audit my whole domain or a single page? One URL at a time — a homepage, a landing page or a single article. To cover a site, scan each URL you care about; Pro adds recurring monitoring of the domains you track.

What does Pro include? Pro is $4.99 per month and adds AI analysis on every audit, Core Web Vitals, reports in 6 languages, recurring monitoring of tracked domains, multi-page audits, branded PDF export and extended history. It is in final testing — join the waitlist from the pricing section.

Create a free account to keep your reports, or read the SEO guide to understand each check before you fix it.