isSemantic.net vs Rolling Schema

isSemantic.net is a free web tool for validating, generating, visualizing and converting structured data. Its validator accepts JSON-LD, RDFa and Microdata and checks them against Schema.org, Google Search, Facebook Open Graph, Twitter Cards, Facebook App Links and HTML outline semantics. Markup using other vocabularies appears separately and is not validated. The generator creates or edits examples for Google Search, Schema.org, Open Graph and Twitter Cards, accepts imported snippets and allows added Schema.org properties. Google and Schema.org output is JSON-LD; Open Graph and Twitter Cards output is RDFa. The RDF visualizer shows a graph, triples table and hierarchy. It supports formats including JSON-LD, Microdata, N-Quads, N-Triples, N3, RDFa, RDF/XML, TriG and Turtle, with provisional RDF-star support. The converter accepts a URL or snippet, detects formats and converts serializations. Terms restrict use to private, non-commercial purposes.

Rolling Schema re-crawls websites, detects content changes, and regenerates validated schema.org structured data. It delivers JSON-LD server-side through a Cloudflare Worker or WordPress plugin so crawlers receive it in the page HTML. Shopify, Wix, Squarespace, and custom sites can use the API to render JSON-LD in their own templates or pipelines. Crawl intervals range from 30 minutes to no longer than one day. The service generates more than 20 schema types, including LocalBusiness, Product, Article, Event, FAQPage, HowTo, Recipe, Organization, Person, JobPosting, and Breadcrumb. Free covers five pages on one domain, 500 credits per month, and no API access. Standard costs €79 a month and includes one domain and 2,500 monthly credits, without API access. Power costs €249 a month, includes API access, 10 domains, and 20,000 monthly credits. Ultimate costs €749 a month and includes unlimited domains, dedicated GPU capacity, white-label reporting, and a custom deployment and SLA. The product targets local and service businesses, publishers, small e-commerce sites, and agencies managing client domains.