JSON Schema Validator

About This Tool

JSON Schema Validator checks a JSON document against a JSON Schema and reports every failure as a path-based message ($.user.email: ...), so you know exactly which field is wrong rather than just that something is. It covers a documented subset of the keyword spec, not the full draft.

If you only need to confirm text is syntactically valid JSON (no schema involved) use JSON Validator instead; it's lighter and doesn't require writing a schema.

Key Features

• Path-based error report: every failure lists the exact JSONPath location and reason, one per line.
• Built-in draft meta-schemas: load Draft 2020-12, 2019-09, v7, v6, v4, or v3 directly from the official schema URLs.
• SchemaStore.org presets: fetch real-world schemas for package.json, tsconfig.json, .eslintrc, Docker Compose, GitHub Actions/Workflow, and more.
• Separate data & schema panes: edit both independently, each with its own upload, sample, and line/char status.
• Copy or download the report: export the validation result as plain text.
• Keyboard-driven: Cmd/Ctrl+Enter to validate, Cmd/Ctrl+Shift+C to copy the report.

Example

Schema:

{
  "type": "object",
  "required": ["email"],
  "properties": {
    "email": { "type": "string", "format": "email" },
    "age": { "type": "integer", "minimum": 0 }
  }
}

Data with an invalid email produces:

$.email: does not match format "email" (basic check only).