Comparison
Screaming Frog is a powerful crawler. But it validates schema as part of a broader site audit — not in real-time, not before deploy, and not with rich result eligibility checks. SchemaCheck is purpose-built for structured data: validate before you publish, monitor continuously after.
| Feature | SchemaCheck | Screaming Frog |
|---|---|---|
Real-time validation SchemaCheck validates instantly via API. Screaming Frog requires a full site crawl. | ✓ | — |
Validate before deploy SchemaCheck accepts raw JSON-LD — no live URL required. CI/CD integration supported. | ✓ | — |
Rich result eligibility SchemaCheck checks Google's current eligibility requirements per schema type. | ✓ | — |
Fix suggestions Each error includes a specific remediation with a documentation link. | ✓ | — |
Continuous monitoring SchemaCheck re-validates URLs on a schedule and alerts on changes. | ✓ | — |
REST API SchemaCheck is API-first. Screaming Frog is a desktop application. | ✓ | — |
Batch URL validation Both support bulk validation. SchemaCheck via API; Screaming Frog via crawl. | ✓ | ✓ (via crawl) |
No-code web checker SchemaCheck has a no-code web interface. Screaming Frog requires desktop install. | ✓ | — |
Deprecation warnings SchemaCheck flags deprecated and restricted schema types for Google. | ✓ | — |
Full site technical SEO audit Screaming Frog covers crawl budget, redirects, canonicals, and more. | — | ✓ |
Free tier SchemaCheck free tier covers automation and testing. Screaming Frog is paid. | ✓ 100/mo | — |
Screaming Frog crawls pages that already exist. SchemaCheck accepts raw JSON-LD via POST, so you can validate schema during development — in a CI pipeline, a pre-publish webhook, or a local build step. By the time Screaming Frog finds the issue, it's already in production.
Screaming Frog flags structured data errors it can identify from the page source. SchemaCheck goes further: it checks whether your schema meets Google's current requirements for each rich result type, including recently deprecated types and property-level restrictions that don't show up as simple errors.
A Screaming Frog crawl is a point-in-time snapshot. Between crawls, a CMS template change can silently break schema across thousands of pages. SchemaCheck monitors URLs continuously and alerts you when a page's schema health score drops or its rich result eligibility changes — no crawl schedule required.
Use Screaming Frog when:
Use SchemaCheck when:
Validate before you deploy. Monitor after. Get fix suggestions with every error.