JSON-LD Validator

Catch the markup mistakes that cost citations

Broken structured data is worse than none — engines distrust a page whose markup doesn't parse or doesn't match what's on it. Paste your JSON-LD (with or without the <script> wrapper) and this tool checks it: valid JSON, a real @context and @type, the fields each type needs, and common errors like relative URLs or non-ISO dates. It runs entirely in your browser.