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JSON Schema Validator

AI / Agent

Validate any JSON value against a JSON Schema (Draft-07): types, required fields, patterns, formats, and nested rules.

This lives in the AI tools category specifically because agent pipelines that call tools or parse structured LLM output need to validate the result against a contract, and this does that: paste a JSON value and a Draft-07 schema side by side and get back the exact rule and path that failed, not just a pass/fail. Standard `format` keywords like `email` and `date-time` are checked, though format validation is technically an annotation-only feature in the spec and enforcement varies slightly across validator implementations. It's the same core validation job as the JSON category's JSON Schema Validator tool, positioned here for agent and pipeline debugging use cases. Pair it with the JSON Schema Generator to draft a schema from a description first, then validate real sample payloads against it here. For bulk validation of many records, the REST API or SDK is the better fit than this one-off browser tool.

jsonschemavalidatedraft-7type-checkagent

How to use JSON Schema Validator

  • 1.Paste a JSON value and a Draft-07 JSON Schema side by side to check whether the value satisfies types, required fields, and nested rules.
  • 2.Use it to debug why an API response is failing validation in your backend by seeing the exact rule and path that failed.
  • 3.Pair it with the JSON Schema Generator to first draft a schema from a description, then validate real sample payloads against it here.

Frequently asked questions

Does this run in my browser or on a server?
Validation runs entirely client-side using a JSON Schema validator library — neither your data nor your schema is uploaded.
Which JSON Schema draft does it support?
Draft-07 is supported; schemas written for Draft 2020-12 or other drafts using newer keywords may not validate exactly the same way.
Does it validate formats like `email` or `date-time`?
Yes, standard `format` keywords are checked, though format validation is technically an annotation-only feature in the spec and enforcement can vary slightly between validator implementations.
Can I validate large datasets against a schema in bulk?
The browser tool is built for one-off checks; for batch validation of many records, use the REST API or SDK in a script.

Use via API, SDK, or MCP

Installnpm install @utilix-tech/sdk
Usageimport { ai_agent } from '@utilix-tech/sdk'
const schema = { type: 'object', properties: { name: { type: 'string' } }, required: ['name'] }
const result = ai_agent.validateJsonSchema({ name: 'Alice' }, schema)
console.log(result.valid) // true

Runs locally · no API key · no rate limits · Node.js SDK docs →