Semrush’s Site Audit is one of the most comprehensive technical SEO crawlers available, and its Markup report is the part most relevant to structured data. When you run a site audit, Semrush crawls your pages and produces a dedicated Markup section that lists issues found with your JSON-LD, Microdata, and Open Graph tags. You can see at a glance which pages have schema errors, which are missing recommended markup, and where Open Graph tags are incomplete or malformed.
What I find particularly useful is having schema analysis integrated with the rest of your technical audit. You can see a schema issue on a page and immediately pivot to check the same page’s other technical factors, such as its load speed, canonical configuration, or internal linking profile, without switching tools. That holistic view is genuinely helpful when you’re diagnosing why a page isn’t performing as expected. Sometimes a schema issue is compounded by another technical problem, and the integrated audit surface makes those relationships easier to spot.
The catch is the price. Semrush starts at around $139.95 per month, which is a significant investment if you’re only interested in the schema audit capabilities. The Markup report is a feature within a broader platform, not a standalone tool, so you’re paying for the full suite. If you’re already a Semrush subscriber, the Markup report is a genuinely valuable addition to your structured data workflow. If you’re not, the Google Search Console Enhancements report and the free validators will get you most of the way there at no cost.