Free, no sign-up. We don't store the URLs you check.
What it checks
- HTTPS
- Title length
- Meta description length
- Canonical URL
- Page language
- H1 heading
- Open Graph tags
- Share image loads, 1200×630
- X (Twitter) card
- Favicon and Apple touch icon
- JSON-LD parses
- robots.txt
- sitemap.xml
- llms.txt
Why before launch
On launch day your link gets shared on X, LinkedIn, Slack and dozens of directories. A missing share image means a blank card. A missing description means each site makes one up. A blocked robots.txt means Google never lists you.
These are the same rules the kit's check-seo script runs. Next: check your tagline against each launch site's limits, or see where to launch.