# Free SEO Checker

> An SEO checker fetches a URL and runs the on-page checks that decide whether a page can rank at all: title and description length, canonical, indexability, heading structure, alt text coverage, Open Graph tags and word count. Each failed check comes with the specific fix.

Source: https://rankcert.com/tools/seo-checker
Free, no signup. Updated: 2026-08-29

## How to use it

1. Paste the URL of the page you want audited.
2. We fetch it once and run eleven checks against the rendered head and body.
3. Work down the failed checks - they are ordered by how much they cost you.

## Questions

### What does the score mean?

It is the share of eleven on-page checks the page passes. It is a completeness measure, not a ranking prediction - a page can score 100 and still not rank if it has no links or no depth.

### Does this replace a full site crawl?

No. This audits one URL. Site-wide problems - orphan pages, duplicate titles across templates, broken internal links - need a crawler.

### Why does word count matter?

Under about 300 words of visible text, a page rarely has enough substance to rank for anything competitive. It is a rough signal, not a target to pad toward.

### Do you run JavaScript?

No. We read the HTML your server returns, which is what a crawler reads on its first pass. If your content only appears after JavaScript runs, that is worth knowing.

### How often should I re-run an on-page check?

After any template change, and once a quarter otherwise. Most on-page regressions arrive with a deploy, not with time.

### What is the single highest-impact on-page fix?

A title that matches the query the page targets. Nothing else on the page moves rankings as reliably, and it is a one-line change.

### Does this check Core Web Vitals?

No. Field performance data comes from Chrome's CrUX report and needs real user traffic. Use PageSpeed Insights for that side.

### Why does a page pass every check and still not rank?

On-page work makes a page eligible, not competitive. If the pages ranking above you have hundreds of referring domains and yours has none, the gap is authority, not tags.

## Related tools

- [Redirect Checker](https://rankcert.com/tools/redirect-checker): Follow every hop a URL takes, see the status code at each step, and find the chains, loops and temporary redirects that leak link equity.
- [Broken Link Checker](https://rankcert.com/tools/broken-link-checker): Crawl any page for broken links, see the status code behind every dead URL, and separate the internal ones that cost you link equity from the external rot.
- [Backlink Verifier](https://rankcert.com/tools/backlink-verifier): Check whether a page really links to your domain, what rel attribute the link carries, and whether the page is indexable at all.
- [Outbound Link Checker](https://rankcert.com/tools/outbound-link-checker): List every external link on a page with its rel attribute, count how many pass equity, and catch affiliate links that should be marked sponsored.
- [robots.txt Generator](https://rankcert.com/tools/robots-txt-generator): Build a valid robots.txt with your disallow rules, sitemap reference and optional AI crawler blocks, ready to paste at the root of your site.
- [llms.txt Generator](https://rankcert.com/tools/llms-txt-generator): Generate an llms.txt file that tells AI answer engines what your product is and which pages matter, in the markdown format the proposal specifies.