An SEO site checker crawls every reachable page on your website and scores it against a set of technical checks — broken links, missing meta tags and alt text, slow load times, duplicate content, mobile usability, HTTPS issues — then rolls the results into a single health score with a prioritised, page-by-page fix list. Illumae's site audit does exactly that: point it at your domain, and it returns a 0-100 health score plus specific, actionable suggestions per page, not just a list of problems.
A lot of free website analysis tools stop at "here are 40 things wrong with your site" and leave you to work out which ones matter. Illumae's seo score checker separates critical issues (the ones actively hurting crawlability or rankings) from warnings (worth fixing, not urgent), and tells you which specific pages are affected — so "check my website seo" turns into a real, ordered to-do list instead of a wall of red flags.
Crawlability and errors
4xx/5xx error pages, broken internal links, and HTTPS/SSL problems — the issues that stop a page from being properly indexed at all.
On-page fundamentals
Missing or oversized title tags, missing meta descriptions, missing image alt text, heading structure problems, and thin content — checked page by page, with the exact character counts and word counts shown, not just a pass/fail flag.
Performance and mobile
Load time per page (flagged over roughly three seconds) and mobile usability issues — the two most common reasons a technically "correct" page still underperforms.
Site structure
Internal link counts per page (too few, and a page is effectively orphaned) and duplicate content across the site — both easy to miss without crawling the whole domain at once.
Every issue is grouped by category and severity. Click a category and it jumps straight to the affected pages — you're never scrolling through a flat list trying to spot the pattern yourself.
Each page shows specific, worded suggestions — not just "meta description missing," but a concrete fix recommendation for that exact page, alongside its word count, internal and external link counts, and load time.
Noindexed and robots.txt-disallowed pages are shown separately. They're crawled so you can see them, but excluded from the health score, since scoring a page that was never meant to be indexed would be misleading either way.
A site audit reports on your own website's technical health — it isn't a substitute for a manual accessibility review, a full log-file crawl-budget analysis, or a penalty investigation, and it can't fix issues for you automatically (it tells you what and where, you or your developer make the change). If a crawl only reaches a handful of pages because the rest are blocked or unreachable, the results are flagged as partial rather than presented as a complete, final score.
Every crawled, indexable page gets a page score based on the issues found on it — things like missing meta tags, slow load time, thin content, or broken internal links. Pages that are noindexed or disallowed by robots.txt are crawled but excluded from scoring, since they were never meant to rank. The site health score rolls all indexable page scores together: 80+ is treated as excellent, 60-79 as needing attention, and below 60 as critical.
It tells you, rather than silently giving you an incomplete score as if it were final. If pages time out, are unreachable, or block crawlers during a run, the audit flags exactly how many and (where available) why, and keeps your previous audit if too few pages were reachable to produce a meaningful result.
Yes — mobile usability issues and slow-loading pages (over roughly three seconds) are both tracked as their own issue categories, alongside broken links, missing alt text, missing meta descriptions, duplicate content, and HTTPS/SSL problems.
There's no fixed schedule built in — re-run it whenever you've made site changes, published a batch of new content, or just want a current read. The dashboard always shows your most recent audit's date, so it's obvious how fresh the data is.
A low health score doesn't directly cause a ranking drop — it flags issues that are correlated with poor rankings (slow pages, broken links, missing metadata) and are worth fixing regardless. Treat the score as a prioritised to-do list, not a ranking prediction.
No credit card required. Run a full crawl of your own site and see your real health score.