SchemaValid vs VitalSentinel Schema Validator

SchemaValid is a browser-based toolkit for JSON-LD, structured data and technical SEO. Its tools include schema validation, sitemap and robots.txt utilities, plus tools for text and content, AI search, analytics, campaigns and other tasks such as IBAN validation. The validator checks a live URL or pasted JSON-LD and reports an SEO score, errors, warnings and rich-results readiness. URL checks provide scorecards for 16 schema types, including Organization, Product, Article, Recipe, Event, FAQPage, JobPosting, Course, VideoObject and SoftwareApplication; the limit is five URL checks per minute per visitor. Pasted-code validation runs locally without uploading or storing the code or tying it to an account. The AI Search Readiness Checker scores a page out of 100 across eight categories, using the page and its robots.txt, sitemap.xml and llms.txt. A robots.txt editor offers a live preview for crawler rules, AI-bot access and sitemap settings. The tools are free without registration, though availability may change.

VitalSentinel Schema Validator checks structured data on a page URL and separates missing, recommended and broken information. It examines JSON-LD blocks individually, including nested entities and entities within an @graph. For broken blocks, it identifies line and column and names common causes such as trailing commas, curly quotes and HTML entities. Its property checks distinguish Google-required from recommended fields for Article, Product, FAQPage, Recipe, Event, BreadcrumbList, LocalBusiness and Organization; other listed types are not graded. It also flags non-absolute image URLs, dates outside ISO format and prices containing a currency symbol. The free checker reads server-sent HTML, so it cannot see JSON-LD inserted by JavaScript. It reports microdata and RDFa when present but does not grade them. A valid result does not guarantee a Google rich result, and the tool recommends Google's Rich Results Test for rendered pages and eligibility checks. It is available on web and via API. The plan list includes a free plan and Starter at $39 a month.