Free SEO Checker
DefiniteSEO is a free SEO checker, SEO analyzer and SEO tester that runs a full SEO analysis of any web page across 190 points, giving you an overall SEO score with a clear fix for every issue, all in one instant scan.
A complete SEO checker, not a surface score
As a full website SEO checker and SEO audit tool, every scan runs a complete SEO checkup across on-page, technical and content checks, rolls it into a single SEO score, and explains each issue with a fix.
Every on-page signal, checked and previewed
The core tags and files that tell search engines what your page is about, each checked and shown in a live preview.
- Title and meta description with a SERP preview
- Canonical, favicon and SEO-friendly URL
- Open Graph, Twitter and breadcrumb tags
- Schema, including Image and Video, plus robots and sitemap
Keyword placement and density, scored
Pick a keyword or accept a suggestion, then see exactly where it appears and how well the page is optimised for it.
- Keyword suggestions from one to four words
- Count and density with a word cloud
- Nine placement signals, from title to image alt
- Keyword highlighting across the page
Content depth and readability grade
Check whether your content is deep enough and easy enough to read, with real readability grades and a spelling pass.
- Word count, paragraphs and headings
- Stop-word ratio, bold usage and average sentence length
- Eight readability formulas, from Flesch-Kincaid to SMOG
- Spelling-mistake check
Every link, typed and checked
Understand your internal and external linking, and catch the broken and redirected links that leak authority. For the off-page links pointing to your site, use the Backlink Checker.
- Internal, external, nofollow and follow counts
- Link ratio and anchor-text quality
- Broken and redirected links
- A full table of every link with status
Media that search engines can read
Make sure every image and video is described and structured so it can rank and be understood.
- Alt text, title, filename and aspect ratio
- Base64 image detection
- Video schema, thumbnails and subtitles
- Image list with hover previews
Security issues that hurt trust and rank
A security pass that covers both the basics and the modern browser signals Google now looks at.
- HTTPS and plaintext-email exposure
- Modern HTTP, such as HTTP/2 and HTTP/3
- JavaScript library versions and deprecated APIs
- XSS, CSP and browser console errors
Accessibility, checked the Lighthouse way
Accessible sites are easier for everyone, and for search engines, to use. DefiniteSEO runs a full accessibility pass.
- Contrast and accessible names
- ARIA attributes and roles
- Landmarks and heading order
- Tab order, language and zoom
Domain, DNS and email security
Check the domain and network signals behind your site, including the email records that protect your sender reputation.
- Domain age, expiry and subdomains
- A, AAAA, MX, CNAME, TXT, SOA and Reverse DNS
- SPF, DKIM and DMARC email security
- WHOIS registrar details
Speed measured the way Google measures it
A full Lighthouse-grade performance pass with the metrics and charts that actually explain a slow page. For a focused speed test, try the Website Speed Test.
- Core Web Vitals: FCP, LCP, CLS, TBT, Speed Index and TTI
- Resource waterfall and connection-timing charts
- Render-blocking, unused CSS and JS, image delivery and cache policy
- Server response, page size, request count and CDN detection
Ready to check your website’s SEO?
Run a free scan and get your SEO score, and every fix, in under a minute.
Scan your whole site, not just one page
Turn a single URL into a full project and audit every page, from the sitemap to the links a visitor actually sees.
- Crawl the sitemap and the visible links on your homepage
- Bulk and sequential scanning
- Analyzed, unanalyzed and queued page counts
- Not-in-sitemap warnings
Re-scan on a schedule, automatically
Keep your scores current without lifting a finger. Set a cadence and let DefiniteSEO re-audit for you.
- Daily, weekly or monthly
- Home page, visible links or both
- Run now on demand
- Full job history
Share reports the way clients want them
Send a polished report in whatever format suits, with your own branding applied.
- Shareable public link
- Email the report
- HTML and PDF export
- White-label branding applied throughout
Bring your whole team in
Invite your team, control what each person can do, and assign projects across the workspace.
- Invite members with roles
- Fine-grained permission matrix
- Assign projects to members
- Workspace activity log
Make every report your own
Present DefiniteSEO as your own tool, from the logo on the report to the domain it is served from.
- Your logo and company name
- Custom domain
- Agency SMTP for report emails
- Client-ready, unbranded reports
Free tools for every part of your SEO
The SEO Checker is part of the DefiniteSEO all-in-one AI SEO tool, the full platform for audits, AI visibility and backlinks. Go deeper on the areas that matter most.
How DefiniteSEO compares to other SEO checkers
Free SEO checkers like the Seobility SEO checker, the Semrush SEO checker and SEO Site Checkup cap their reports or gate the fixes. DefiniteSEO runs all 190 checks with a clear fix for each, free.
| Capability | DefiniteSEOSEO Checker | SEO Site Checkup | WooRank |
|---|---|---|---|
| Free instant scan, no signup to start | Yes | Limited | Trial |
| Full 190-point audit across 15+ categories | Yes | Yes | Yes |
| Core Web Vitals and page speed | Yes | Yes | Yes |
| Broken and redirected link checks | Yes | Varies | Varies |
| Whole-site crawl and scheduled re-scans | Yes | Paid | Paid |
| White-label reports | Yes | Paid | Paid |
| A clear fix for every issue | Yes | Partial | Partial |
A complete SEO checker with a fix for every issue, free to start.
Competitor capabilities as publicly listed by each vendor, August 2026.
Frequently asked questions
What is an SEO checker?
An SEO checker, also called an SEO audit tool, SEO analyzer or web page SEO checker, scans a web page and reports the on-page, technical and content issues that affect how it ranks. DefiniteSEO runs a 190-point audit across more than 15 categories and gives you an overall SEO score with a fix for each issue, working as a free Google SEO checker.
What does an SEO audit include?
Every scan runs more than 190 checks across 15-plus categories: title and meta tags, headings, keywords, content and readability, internal and external links, images, page speed and Core Web Vitals, security, accessibility, structured data, and domain and DNS records. Each check is scored and comes with a recommended fix.
Is it free?
Yes. You can run a full SEO check on any URL for free, with no signup to start. Advanced features such as backlinks, scheduled site-wide audits and white-label reports are available on the Pro plans.
Do I need to sign up or install anything?
No. It runs entirely in your browser. Paste a URL, choose desktop or mobile, and get your report. There is nothing to install, and you can start without an account.
What counts as a good SEO score?
The SEO score checker rates each page from 0 to 100. Above 70 is great, 50 to 70 is good with room to improve, and below 50 needs attention. Every issue is grouped into Critical, Recommended and Improved so you know what to fix first.
Does it tell me how to fix the issues it finds?
Yes. Every issue in the report comes with a plain-language explanation and a recommended fix, sorted into Critical, Recommended and Improved so you can prioritise the changes that improve your score the most.
Can I check my whole website, not just one page?
Yes. Beyond single-URL checks, you can crawl your whole site, run bulk audits, schedule daily, weekly or monthly re-scans, track your history over time, and rebrand the reports under white label.
How is this different from other SEO checkers?
DefiniteSEO gives you a complete 190-point audit with backlinks and technical checks in one free instant scan, and a clear fix for every issue, not just a shallow score. Many free checkers either cap your daily scans or stop at a surface-level report.
Check the SEO of any website, free
One URL, one instant scan. See your SEO score and exactly what to fix to rank on Google.