Free — No signup required
Free SEO Audit
Get an instant SEO score and prioritised fixes for any website — in under 15 seconds.
No account needed Results in ~15 seconds Shareable report link
Get an instant SEO score and prioritised fixes for any website — in under 15 seconds.
Online SEO analysis for any URL · No install · Results in < 15 seconds
OptiAISEO's free SEO audit tool analyses any webpage in under 15 seconds — no account, no browser extension, no desktop install. You get a scored report covering on-page SEO, technical health, indexability, and content quality, with each issue ranked by the impact it will have on your Google rankings if you fix it.
Most free SEO checkers surface a list of warnings and leave you to work out what matters. This online SEO checker tells you which three fixes will move the needle fastest — then links you to the exact documentation to implement them. If you need fixes applied automatically, OptiAISEO Pro opens a GitHub pull request with the corrected code so your engineer just clicks merge.
An SEO audit is a structured review of a webpage or website against the signals search engines use to decide where it ranks: on-page elements (title, headings, content), technical health (speed, crawlability, structured data), content quality, and indexability. Think of it as a health check for your visibility on Google.
The reason you need one is that most ranking problems are completely invisible during normal browsing. A noindex directive left in place after a staging migration. A canonical tag pointing to the wrong URL. A hero image causing your Largest Contentful Paint to breach Google's 2.5-second threshold. None of these show up when you visit your site in a browser — but all of them can suppress your rankings for months before anyone notices.
A free website SEO audit surfaces these issues in seconds. It gives you a prioritised fix list so you know which change will have the biggest ranking impact — rather than spending a week on cosmetic improvements while a crawl blocker quietly tanks your most important pages.
When to audit
What it catches
What it improves
Six categories. Every check runs in parallel so results come back in seconds, not minutes.
Title tags, meta descriptions, heading hierarchy (H1–H6), keyword placement, image alt text, and internal anchor text — every on-page signal scored and explained.
Canonical tags, robots directives, Core Web Vitals flags, crawlability, structured data presence, HTTPS enforcement, and mobile usability — all checked automatically.
Whether Google can find, crawl, and index your page. Identifies noindex tags, blocked resources in robots.txt, redirect chains, and sitemap conflicts.
Thin content detection, duplicate title/description flags, content length relative to intent, and readability scoring — so you know exactly why a page underperforms.
HTTPS validity, mixed-content warnings, missing security headers, and Core Web Vitals thresholds — signals Google uses to assess page experience.
Issues ranked by SEO impact, not volume. You see which three fixes will move rankings fastest — not a wall of warnings sorted by severity alone.
Here's what a real website SEO audit looks like. Every check is scored, explained, and ranked by impact — not just listed.
Audited URL
https://example-saas.com/pricing
SEO score
Needs work
4
Pass
3
Warning
3
Fail
Top 3 fixes by ranking impact
Title tag
WarningTitle is 78 chars — truncated in SERPs above 60. Rewrite to ≤ 60 chars.
Meta description
FailMissing. Google will auto-generate a snippet, usually poorly. Add a 120–155 char description.
H1 tag
PassOne H1 found: "Plans & Pricing". Matches page intent.
Canonical tag
PassSelf-referencing canonical present. No duplicate content risk.
Core Web Vitals — LCP
FailLCP estimated at 4.1 s (threshold: 2.5 s). Largest element: hero image. Compress and add fetchpriority="high".
Structured data
WarningNo Product or PriceSpec schema found. Adding JSON-LD can trigger rich results for pricing pages.
Mobile usability
PassViewport meta present. No tap-target or font-size issues detected.
HTTPS
PassValid TLS certificate. No mixed-content warnings.
Internal links
Warning0 internal links on this page. Add links to /features and /docs to distribute page authority.
Image alt text
Fail3 of 5 images missing alt attributes. Add descriptive alt text for accessibility and image SEO.
This is a representative example. Run the free SEO audit above to see the real report for your URL.
Paste your homepage, a landing page, or a blog post — the checker runs on any publicly accessible URL. No account, no install.
OptiAISEO crawls the page, evaluates on-page signals, technical health, indexability, and content quality. Results stream back in under 15 seconds.
Your report lives at a unique URL you can share with your team or client immediately. No export required — the link is the deliverable.
Both tools are powerful for deep site crawls. But for fast, shareable, single-page SEO audits they have real limitations.
These tools are the right choice for scheduled, full-site crawls by technical SEO specialists. But when you need to check a single page right now — before a client call, after a deployment, or to diagnose a traffic drop — a browser-based free SEO audit tool gets the job done in a fraction of the time.
All three check technical SEO issues. Here's what makes them different.
| Feature | OptiAISEO (free) | Screaming Frog | Sitebulb |
|---|---|---|---|
| Price | Free — no card needed | £199/year licence | From $139.99/year |
| Setup required | None — runs in browser | Windows/Mac desktop app | Desktop app install |
| Result speed | < 15 seconds | Minutes (full crawl) | Minutes (full crawl) |
| Shareable report link | ✓ Instant | ✗ Export only | ✗ Export only |
| AI visibility tracking | ✓ Included in Pro | ✗ Not available | ✗ Not available |
| Auto GitHub fix PRs | ✓ Included in Pro | ✗ Not available | ✗ Not available |
| AI content generation | ✓ Included in Pro | ✗ Not available | ✗ Not available |
| No login for quick audit | ✓ Always | ✗ Requires install | ✗ Requires install |
Pricing correct as of 2026. Screaming Frog caps its free version at 500 URLs.
Audit your marketing site before launch or after every major content push. No engineering overhead — just a URL and a result.
Drop a shareable report link into every client proposal. Professional, instant, and white-label-ready when you upgrade.
Check individual pages before and after publishing. Confirm your H1, meta description, and internal links are correctly set without touching a crawler.
Run an audit after every CMS migration, template change, or A/B test to catch regressions before they cost you ranking positions.
The free SEO audit shows you what's broken. OptiAISEO Pro fixes it — automatically opening GitHub PRs with the exact code change, tracking your AI visibility, and generating content that ranks.
Start free — no credit card