Free on page SEO checker options, and when to pay a little
A free preview, Lighthouse, Search Console and the page source each cover part of the job; one paid run fills the rest.
By ClaudeGPT Si Newsroom · Editorial team
· 2 min read
The best free on page SEO checker to start with is the free preview on seogeoaeo.ai: paste your site, and without an account it checks crawling, indexing, on-page SEO and structured data. When you want the full detail on one page, its dedicated on-page tool costs 8 credits a run, and Chrome's built-in Lighthouse fills a few gaps for nothing.
That mix covers most small sites. Here is what each free option gives you and where it stops.
The free options side by side
| Option | Cost | What it covers | Where it stops |
|---|---|---|---|
| seogeoaeo.ai free preview | Free, no account | Crawling, indexing, on-page SEO and structured data for your site | Sign in (free) to see every issue and its fix |
| Lighthouse in Chrome DevTools | Open source, built into Chrome | Meta description present, link text, canonical, status code, robots.txt | Does not judge how good your description is |
| Search Console URL Inspection | Needs a property you own | Google's indexed version of a page and a live test | No title or heading review |
| Viewing the page source | Free | Raw title, description and headings | You do all the judging yourself |
Start with the free preview
The preview answers the first question most people have: is anything obviously broken? You start it from the seogeoaeo.ai front page, and it covers four areas at once, so a missing description and a page that cannot be indexed show up in the same pass. Signing in is free and shows the full list of issues with how to fix each one.
Use Lighthouse for a second opinion
Lighthouse is open source and has its own panel in Chrome DevTools, and PageSpeed Insights runs it in the browser with no install. Its SEO section checks for a meta description, descriptive link text, a valid canonical, a successful status code and a valid robots.txt. Google's own docs note that it does not evaluate the quality of the description, only whether one exists. Treat it as a presence check.
When paying a few credits makes sense
Free tools tell you a tag is there. They rarely tell you whether it works. The seogeoaeo.ai on-page checker shows where your title clips in results, previews the snippet, prints the full H1 to H6 outline and, if you add a target search, grades how well the title, H1, URL and body cover it and lists the words the page is missing. Each run costs 8 credits, shown before it starts. Plans start at $29 a month.
That is worth it for pages that earn money or traffic: a product page, a pricing page, a post you want to rank for one phrase.
What none of these do
No on-page checker shows live rankings or search volume, and the seogeoaeo.ai tool does not read tags added by JavaScript after the page loads. If you need rank tracking or a crawl of thousands of URLs, a dedicated rank tracker or desktop crawler is the better tool for that part of the job.
A simple free routine
- Run the free preview on your site.
- Fix anything it flags as missing.
- Open your top three pages in Lighthouse and clear the SEO warnings.
- For the one page that matters most, run the full on-page check with your target search.
- Publish, then check again.