JSON-LD Playground vs VitalSentinel Schema Validator
JSON-LD Playground
json-ld.github.io
VitalSentinel Schema Validator
vitalsentinel.comSide by side
| Figure | JSON-LD Playground | VitalSentinel Schema Validator |
|---|---|---|
| Price from | — | $39/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 0 | 5 |
| Spec score · Schema Markup Tools | 7.4 (#12) | 7.8 (#8) |
| Integrations | The repository identifies Cloudflare Pages as the site deployment platform and says the site is published using Eleventy. | VitalSentinel lists Google Analytics 4 and Google Search Console as integrations, each with a stated two-minute setup time. |
| Purpose | The playground lets users enter JSON-LD markup and see the generated output. | The Schema Markup & JSON-LD Validator checks structured data on one page URL and separates missing, recommended, and broken information. |
| Support | The JSON-LD site says anyone may join the Community Group, participate on its mailing list, join discussion calls, and collaborate on projects. | The pricing page says custom solutions for large organizations can include dedicated support and SLAs. |
Plans
VitalSentinel Schema Validator
- Free planFree
- Starter$39 a month
- Lite$129 a month
- Standard$249 a month
- Advanced$449 a month
In their own words
JSON-LD Playground
JSON-LD Playground has no write-up on Specifiction yet; its figures are above.
VitalSentinel Schema Validator
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.