// free-tool
SEO Checker
Paste any public URL and get a scored technical audit — 25+ on-page and technical checks, each with an error, warning or pass badge and the raw measured value.
no signup · 10 audits per hour · results are public via their link
Recent audits
What it checks
Meta data
Title and description length, canonical, robots directives, Open Graph, Twitter Cards, JSON-LD and favicon.
Structure & quality
H1–H6 outline with hierarchy gaps, word count, text-to-HTML ratio and image alt coverage.
Links
Internal, external and nofollow distribution, plus links with no readable anchor text.
Technical
HTTP status, redirect chain, HTTPS, TTFB, compression, payload size, robots.txt and sitemap discovery.
Core Web Vitals
LCP, CLS, TBT, FCP and Speed Index from the free Google PageSpeed Insights API, on demand.
Safe by default
Public URLs only — private and loopback addresses are blocked, every fetch is time-boxed and size-capped.
How the score works
Every check is weighted by status — good = 1, warning = 0.5, error = 0, informational checks are ignored. The average becomes the on-page score out of 100.
When you run PageSpeed Insights, the headline score becomes a blend: 65% on-page, 15% performance, 12% PSI SEO and 8% accessibility. Missing PSI categories give their weight back to the on-page score.
Known limitations
- ·Single page only — full-site crawling, broken-link discovery and duplicate-content detection are not part of this tool.
- ·Checks run against the server-rendered HTML. Content injected by client-side JavaScript will not be counted (which is exactly how many crawlers see it too).
- ·No backlink or domain-authority data — those require paid providers, so nothing here pretends to estimate them.
Want these issues fixed properly?
I build and optimise Next.js applications that score well because they're architected well — not because of last-mile patches.