How to use Schema Markup Validator
- Start by adding the text you want to validate into Schema Markup Validator.
- Adjust the Paste JSON-LD or a <script type=application/ld+json> block option to match what you need.
- The result is computed live in your browser as you edit the input.
- Finish by choosing Copy to take the output with you.
About this tool
Schema Markup Validator runs entirely in your browser. Schema Markup Validator assembles valid JSON-LD locally so you can paste it into your page.
Everything is generated on your device with nothing uploaded. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What does Schema Markup Validator do?
Schema Markup Validator lets you validate your input right in the browser using the Paste JSON-LD or a <script type=application/ld+json> block control, with the result shown instantly and nothing uploaded.
Is Schema Markup Validator free to use?
Yes — Schema Markup Validator is completely free, with no usage limits.
Where is my data processed by Schema Markup Validator?
Entirely in your browser — Schema Markup Validator keeps your data on your own machine and sends nothing anywhere.
Does Schema Markup Validator validate against schema.org types?
Schema Markup Validator builds and checks the structured-data markup in your browser so you can paste it straight into your page.
Can I use Schema Markup Validator without a connection?
Yes — after the first load Schema Markup Validator runs entirely offline.