Free Tool
JSON Formatter & Validator
Format, validate, and minify JSON data. Pretty-print with custom indentation, detect syntax errors, and see key counts and nesting depth. 100% client-side.
Formatted output will appear here...
What Is JSON?
JSON (JavaScript Object Notation) is the most widely used data interchange format on the web. APIs, configuration files, and structured data (like schema.org markup) all use JSON. Well-formatted JSON is easier to read, debug, and maintain.
JSON & SEO: Schema Markup
JSON-LD (JSON for Linking Data) is Google's recommended format for structured data markup. Proper schema markup helps search engines and AI understand your content. Use our JSON-LD Schema Generator to create structured data, and our Structured Data Tester to validate it.
Need to validate JSON-LD schema markup?
Generate and validate structured data for rich search results and AI citation.
Generate JSON-LD Schema