100% Free · No signup · Open source

Free Schema Markup Generator & Validator

Generate clean, Google-ready JSON-LD structured data in seconds — then validate any markup against Google's requirements. Pick a schema type to start.

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Schema markup generators

Every generator outputs valid schema.org JSON-LD with live validation, one-click copy, and a ready-to-paste <script> snippet.

The fastest way to add schema markup to your site

Schema markup (also called structured data) is code you add to a page to help search engines understand its content. When Google understands your content, it can show rich results — star ratings, FAQ dropdowns, breadcrumbs, event dates and more — which take up more space in search and lift your click-through rate.

This free schema markup generator produces JSON-LD, the format Google recommends. You fill in a simple form, and the tool builds valid schema.org markup in real time. Required fields are flagged in red and recommended fields in amber, so you know your output will pass Google's Rich Results Test before you ever paste it into your site.

Already have markup and want to check it? The schema validator parses your JSON-LD (or extracts it from raw HTML) and tells you exactly which required and recommended properties are missing, in plain English, with a link to the matching generator to fix it fast.

Everything runs in your browser — no signup, no data leaves your machine, and the whole project is open source under the MIT license.