JSON-LD Validator

This tool validates JSON-LD markup used for structured data on websites. It helps web developers, SEO specialists, and content teams verify that ld+json scripts are syntactically correct, reference a valid @context, and declare appropriate @type and property values. By catching errors early, it reduces indexing issues and enables reliable data interpretation by search engines.
Conceptually, the validator parses the JSON-LD payload or the page URL, then cross-checks each node against schema.org definitions. It flags missing required properties, mis-typed values, deprecated fields, and invalid URL formats. It can analyze multiple blocks, report per-block results, and provide concrete fixes such as property renaming, value normalization, or context corrections.
Users benefit from clear, actionable feedback that supports both development workflows and ongoing content governance. Agencies can run batch checks across sites, while developers integrate the tool into CI pipelines. The output highlights severity levels (error, warning, info) and links to example schemas to guide remediation. Core features include syntax validation, presence checks for @context and @type, property type validation, URL syntax and reachability checks, bump detectors for unknown or duplicate properties, and optional batch validation. Use cases include page audits, CMS template validation, and pre-publish checks to ensure data quality before publishing.