validate-schema

You can validate schema.org structured data on a live URL by submitting it to Google's validator.schema.org API, which checks JSON-LD, Microdata, and RDFa markup and returns errors, warnings, and SEO implications.

The best way to check JSON-LD markup for SEO errors is using a validator that leverages Google's validator.schema.org API, identifying specific errors and warnings to help improve rich results and data quality.

Yes, you can validate Microdata and RDFa markup in addition to JSON-LD. The validation process leverages Google's API to surface errors, warnings, and SEO implications across all three structured data formats.

Schema.org validation works with static HTML files and local pages. It can process local HTML alongside live URLs, and supports JS-rendered pages via headless rendering where necessary for accurate SEO checks.

Schema.org validation returns warnings for valid JSON-LD when the markup lacks recommended properties or does not fully meet Google's rich result guidelines, helping you identify opportunities to improve SEO and data quality.

A limitation of using the Google validator.schema.org API for SEO checks is that it validates syntax and schema compliance but does not guarantee rich result eligibility, requiring you to interpret the JSON output to address data quality.