--- title: "Free SEO Audit Tool — Complete Site Check (2026)" description: "Free SEO audit tool — instant, no signup. Tests Core Web Vitals, meta tags, indexability, mobile, security headers, broken links. Get fix-by-fix…" canonical: "https://lemwatch.com/tools/free-seo-audit" source: "https://lemwatch.com" --- # Free SEO Audit > Run a complete free SEO audit in under 60 seconds. Covers Core Web Vitals, on-page SEO, security, indexability, broken links, and mobile-friendliness — with deep-dive links to fix every issue. A real SEO audit is not a single number. It's a structured walk through every ranking factor on your page, surfaced with enough context that you can actually fix what's broken. This tool runs the same checks the agency tools charge $500/month for, and routes you to the right deep-dive tool for each issue. ## What a complete SEO audit covers We group the audit into six families. Each one corresponds to a specific failure mode that hides traffic loss in plain sight. **1. Indexability** — Is the page even allowed to rank? A `noindex` directive, an off-target canonical, or a malformed `X-Robots-Tag` header silently de-indexes pages without any visible symptom. We check the meta robots tag, the HTTP `X-Robots-Tag` header, the canonical URL, the HTTP status code, and detect soft 404s. Deep-dive: [Page Indexability Checker](/tools/indexability-checker). **2. Core Web Vitals** — The three confirmed Google ranking signals: Largest Contentful Paint (under 2.5s), Interaction to Next Paint (under 200ms), and Cumulative Layout Shift (under 0.1). Fail any one and you lose ranking weight on every query. Deep-dive: [Core Web Vitals Checker](/tools/core-web-vitals-checker). **3. Mobile-friendliness** — Google indexes mobile-first. Your mobile experience is the experience that ranks, even for desktop searches. We check viewport meta, tap target sizing, font size, and horizontal scroll. Deep-dive: [Mobile-Friendly Test](/tools/mobile-friendly-checker). **4. On-page SEO** — Title length, meta description quality, H1 uniqueness, image alt coverage, internal link count, and structured data. The 1990s basics nobody can afford to skip. Deep-dive: [Meta Tag Analyzer](/tools/meta-tag-analyzer). **5. Broken links and redirects** — 404s waste crawl budget; redirect chains leak link equity. We follow every internal and external link, flag soft 404s, and surface redirect chains longer than one hop. Deep-dive: [Broken Link Checker](/tools/broken-link-checker). **6. Security and trust** — Missing HSTS, weak TLS, mixed content, and missing security headers all hurt both ranking and conversion. Browsers now warn users on insecure pages, and that warning kills 20–40% of traffic. Deep-dive: [Security Header Checker](/tools/security-header-checker) and [SSL Checker](/tools/ssl-checker). ## What this audit is — and what it isn't This is a **technical SEO audit**. It tells you whether Google CAN rank your page. It does NOT tell you whether your content is worth ranking — that requires keyword research, intent matching, and editorial judgement no automated tool can replace. Treat the audit as a foundation: fix the technical issues first, then invest the time saved into content quality. ## The order to fix things in If everything is broken at once, fix in this order: 1. **Indexability first** — there's no point optimising a page Google won't index 2. **Security second** — a missing HSTS or an expired cert can lose 30%+ of traffic overnight 3. **CWV third** — biggest ranking lift for moderate effort 4. **Mobile fourth** — usually overlaps with CWV fixes 5. **Broken links fifth** — slow but steady ranking gain 6. **On-page SEO last** — refinements once the foundation is solid ## Why one-off audits aren't enough Audits catch the current state. Rankings move because of changes — a third-party script someone added in a marketing tag manager, a CMS template update that introduced a stray `noindex`, a font swap that wrecked CLS. The number-one cause of unexplained ranking drops is a regression nobody knew shipped. Continuous monitoring catches these in minutes, audits catch them after the damage is done. Both have a place; only one prevents lost revenue. ## How LemWatch turns this into monitoring Every check in this audit runs continuously on LemWatch — daily, hourly, or every five minutes depending on your plan. You get an alert the moment something regresses, with the specific URL, the failing check, and a one-click link to the historical timeline so you can see exactly which deploy broke it. Same audit, but instead of running it once a quarter, you know within minutes when anything changes. ## What this tool checks - Core Web Vitals (LCP, INP, CLS) — the metrics Google ranks on - Mobile-friendliness, viewport, tap targets, font size - Page indexability — meta robots, canonicals, X-Robots-Tag, soft 404s - On-page SEO — title, meta description, H1, image alts - Internal and external broken links (404s, redirect chains) - Security headers, mixed content, SSL grade - Image optimisation, font loading, third-party script weight ## Why it matters A complete SEO audit catches the silent ranking killers — a misconfigured canonical, a slow LCP, a hidden noindex — before they wipe out months of traffic. Most paid SEO audits cost $500–$5,000 and take days; this one runs in 60 seconds. ## How to fix what it finds - Fix the top three blockers first (indexability, CWV, mobile) — they have the biggest ranking impact - Use the deep-dive links to run each per-check tool for full detail - Re-audit after every deploy to catch regressions in minutes, not weeks - Set up continuous monitoring so this audit runs daily, not annually ## Methodology We run a Lighthouse audit against the URL you submit using the mobile preset (Moto G4, 4G throttling, 4× CPU slowdown — Google's default). The audit captures Core Web Vitals (LCP, INP, CLS, FCP, TTFB), the mobile-friendly assertions, on-page SEO assertions (title, description, viewport, headings), accessibility scores, and image/font optimisation opportunities. In parallel we fetch the page HTML and headers directly to check indexability (meta robots, X-Robots-Tag, canonical, status), parse and inspect the title/meta-description/headings/canonical, and crawl the first 25 internal links to surface obvious 404s. SSL grade and security headers are read from a separate fast probe. Total audit time targets under 60 seconds. Field data (CrUX) is NOT included in the free audit — that requires 28 days of real traffic and is only available on paid LemWatch plans. The audit is a single-run lab profile; results should be within ±20% of repeated runs on the same URL. ## This tool also answers ### How do I do an SEO audit of a website for free? Enter your domain above. The audit checks titles, meta descriptions, headings, indexability, structured data, Core Web Vitals, HTTPS and mobile usability in one pass, and ranks the findings so you fix the highest-impact issue first. ### What should an SEO audit include? Four layers: crawlability and indexation, on-page content and metadata, technical performance including Core Web Vitals, and trust signals such as HTTPS and structured data. An audit that only lists meta tags is missing most of what moves rankings. ## Frequently asked questions ### Is this really free with no signup? Yes. Run it as often as you like with no account. Paid LemWatch plans add continuous monitoring, alerting, multi-site dashboards, and CrUX field data — but the audit itself is free forever. ### How is this different from PageSpeed Insights? PSI focuses on performance. Our audit adds indexability, on-page SEO, broken links, security headers, and routes you to a per-check deep-dive tool for each issue. Think of it as PSI plus the entire on-page SEO checklist in one run. ### Why do I get different scores each time? Lighthouse is a real Chromium render — network jitter and CPU contention vary scores ±10% between runs. The opportunities and warnings are stable; only the raw scores move. Run 3 times and take the median for a reliable number. ### Does this audit JavaScript-rendered content? Yes. We render the page in headless Chromium before checking — so SPAs and JS-heavy sites are audited correctly. Static HTML-only audits (the cheap kind) miss critical content on modern sites. ### Can I export the report? On the free tier the report is on-screen only. Paid LemWatch plans add white-label PDF exports for client deliverables, scheduled email reports, and historical comparison. ### How often should I run a full audit? Quick technical check: weekly. Full deep-dive review: monthly. Continuous monitoring (recommended): always, via LemWatch. Audits catch problems; monitoring catches regressions before they ship. ### How do I do an SEO audit of a website for free? Enter your domain above. The audit checks titles, meta descriptions, headings, indexability, structured data, Core Web Vitals, HTTPS and mobile usability in one pass, and ranks the findings so you fix the highest-impact issue first. ### What should an SEO audit include? Four layers: crawlability and indexation, on-page content and metadata, technical performance including Core Web Vitals, and trust signals such as HTTPS and structured data. An audit that only lists meta tags is missing most of what moves rankings. ## Related - [All free tools](https://lemwatch.com/tools) - [core web vitals checker](https://lemwatch.com/tools/core-web-vitals-checker) - [Mobile-Friendly Test](https://lemwatch.com/tools/mobile-friendly-checker) - [noindex checker](https://lemwatch.com/tools/indexability-checker) - [Broken Link Checker](https://lemwatch.com/tools/broken-link-checker) - [llms txt generator](https://lemwatch.com/tools/llms-txt-generator) - [Lemwatch pricing](https://lemwatch.com/pricing) - [All monitoring checks](https://lemwatch.com/features)