FREE TECHNICAL SEO AUDIT & GENERATIVE ENGINE OPTIMIZATION (GEO)
Free Website SEO Audit &
Generative Search Optimization (GEO).
Inspect technical SEO health, machine legibility, orphan pages, and benchmark AI citation signals with Sonar's Triad Standards: CiteRank, Information Gain, and Update Resilience.
Clear signals. Clear limits.
Sonar analyzes the original HTML returned to our crawler. It does not render JavaScript or operate a global backlink or keyword-volume index. The technical health score is a transparent weighted checklist (passed checks earn full weight, notices earn 70%, other flagged checks earn zero; failed HTTP pages score zero, and site scores average fetched-page scores), not a Google ranking, a visitor count, or a security certification.
Site crawls sample up to 100 public pages, follow same-origin links to depth 4, respect robots.txt, and resume in small batches while this page is open. Pausing or closing the tab stops requests; resume from History. Dates and keyword overlap are review signals, not proof of traffic decay or cannibalization.
Response time measures Sonar's request from one edge location. It is not a Core Web Vital. The Performance tool requests Google's real PageSpeed results separately and reports unavailable data honestly. Crawl reports are retained for up to 30 days, subject to the shared free storage budget. The free service allows up to 200 crawl starts per day across the platform and bounds active crawls, response size and report storage. Anonymous reports belong to this browser's secure session for 7 days; sign in to retain access across devices during report retention.
90+ badges require a verified business email matching the website domain, proof of domain control and an exclusive organization claim, a completed root-site crawl without critical errors, and a score of at least 90. They disclose the sampled page count and scan date, expire after 60 days, and stop verifying when a newer completed site crawl exists.
Transparent Website Intelligence & Technical SEO Audits
Sonar is an independent technical audit workspace designed for engineering teams, SEO practitioners, and website owners who want verified evidence instead of opaque scores or arbitrary paywalls. Crawl your domain from fast edge workers, detect indexability bottlenecks, verify Core Web Vitals, and simulate search snippets before deploying.
Competitor Exploit Hunter
Scan competitor domains to uncover thin content traps, missing schema rich snippets, edge latency lags, and SERP truncation vulnerabilities with instant attack playbooks.
Lead & Client Hunter
Agency prospecting engine: bulk-audit multiple prospective client websites, rank leads by closing probability, and generate ready-to-pitch executive proposals in one click.
Deep Vulnerability Hunter
Architectural flaw sniffer detecting orphan pages with zero internal in-links, multi-hop redirect chains, canonical conflicts, and crawl budget leaks.
Multi-Scope Edge Crawler
Audit single URLs or run site crawls (up to 50 or 100 pages). Inspect exact HTTP status codes, robots.txt directives, canonical relationships, and duplicate titles.
Native Core Web Vitals Engine
Instant sub-2-second speed test evaluating FCP, LCP, CLS, TBT, TTFB, and compression (Brotli/Gzip) across Mobile (4G) and Desktop profiles.
SERP & Social Simulator
Pixel-width Google desktop and mobile SERP simulator with cut-off detection, plus OpenGraph card previews for LinkedIn and X.
Link Architecture & Orphans
Visual click-depth hierarchy tree identifying pages buried more than 3 clicks deep, alongside orphan pages with zero inbound internal links.
Google Search Console Sync
Connect verified properties to analyze real search impressions, verified clicks, click-through rates, and query position trends over time.
Frequently Asked Questions
What makes Sonar different from other SEO crawlers?
Sonar crawls original returned HTML from Cloudflare edge locations and delivers complete audit findings without requiring subscriptions or paid third-party API keys. It measures actual response times, inspects meta tags and schema markup, and keeps your crawl reports private to your session.
Is Sonar completely free to use?
Yes. Sonar provides free access to single-page audits, fast 50-page crawls, deep 100-page crawls, competitor head-to-head comparisons, SERP simulators, and Core Web Vitals diagnostics.
How does the in-house Core Web Vitals engine work?
Instead of relying on slow 45-second external queues, Sonar features an edge-native speed engine that calculates First Contentful Paint, Largest Contentful Paint, Total Blocking Time, and Cumulative Layout Shift in under two seconds for both Mobile and Desktop viewports.
How does Sonar calculate the technical health score?
Sonar uses a transparent weighted checklist. Each passed technical check earns full weight, notices earn 70%, and warnings or errors earn zero. Failed HTTP pages score zero. The site score is the average of fetched page scores.
How can I detect orphan pages on my website?
Sonar analyzes the sampled internal link graph and identifies pages listed in your sitemap or crawl that have zero incoming internal links from other sampled pages, allowing you to fix internal link equity.