Guide · 11 tools
Marketing and website tools
Return on ad spend, A/B test significance, email ROI, plus free checks for site speed, SSL, redirects, broken links, security headers, SEO basics, SERP previews and AI search readiness.
Marketing spend and site health are measurable, and most of the checks take seconds. These tools score campaigns on return rather than clicks, and run the technical checks a developer would before a launch.
Website checks read publicly visible signals at a point in time; they are not a security audit.
1 / 3
Campaign returns
Whether the ads and emails paid for themselves.
2 / 3
Site health
Speed, security and links.
3 / 3
Search visibility
On-page SEO, how a result looks and whether AI engines can read you.
Common questions
Marketing and website tools: the questions people ask
- What is a good ROAS?
- It depends on margin: break-even ROAS is 1 divided by gross margin, so a 40% margin needs 2.5× just to cover the ad spend. The ROAS calculator shows your break-even.
- When is an A/B test result significant?
- When the difference is unlikely to be chance, usually at 95% confidence. Small samples need large differences; the calculator shows the confidence and the sample still needed.
- What does AI search readiness check?
- Whether crawlers used by AI answer engines can fetch and understand the page: robots rules, structured data, clear headings and answerable content.
Results are estimates based on the figures entered, for general information only, and not financial, investment, tax or legal advice.