LonaDev · Free SEO utilities
Website SEO Checker
Audit the on-page HTML you provide for important SEO elements, spot missing tags and get a practical checklist. This browser-based audit does not crawl or fetch a remote website.
This is a simple technical checklist score, not a Google ranking score. It cannot assess backlinks, server responses, rendered JavaScript from another site, search intent or real-user experience.
Audit results
Title tag
18 characters
Meta description
34 characters
Single clear H1
1 H1 elements found
Canonical URL
No canonical link detected
Mobile viewport
Missing viewport meta tag
Image alt text
0 images missing alt text
Indexability directive
No noindex directive detected
Open Graph title
Check social sharing metadata
Structured data
Check relevant JSON-LD schema
What to improve next
- Write a unique, descriptive title and meta description for each important page.
- Use one clear H1 and organize supporting content with meaningful H2 headings.
- Add descriptive alt text to informative images and use empty alt text for decorative images.
- Set a self-referencing canonical URL and ensure the page is indexable.
- Add relevant structured data only when it accurately describes visible page content.
- Validate mobile usability, Core Web Vitals, internal links and crawlability separately.
More free website tools
How this website seo checker works
Check key on-page SEO elements in pasted HTML. Find missing title tags, descriptions, H1 headings, canonical links, image alt text and more.
Frequently asked questions
What does a website SEO checker do?
It reviews website elements that can affect crawling, indexing, search appearance and usability. This browser-based checker audits HTML you paste; it does not crawl a remote domain or measure rankings.
Can it guarantee higher Google rankings?
No. A checklist can reveal technical opportunities, but rankings also depend on relevance, content quality, competition, links, page experience and many other signals.