JSON to Joi Schema
Generate a Joi validation schema from any JSON sample, ready to paste into your Node.js project.
About JSON to Joi Schema
This tool converts a JSON sample into a Joi validation schema for Node.js. Paste any JSON object and get a schema that covers strings, numbers, integers, booleans, nulls, nested objects, and arrays — all in one click. Toggle between .required() and .optional() to match your validation requirements. The generated schema is ready to copy directly into Express, Fastify, or any plain Node.js project that uses Joi for input validation.
Private & free — this tool runs entirely in your browser.
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