A schema generator that doesn't overwhelm you

JSON Schema (the spec) is powerful but verbose. This tool generates a compact, human-readable alternative.

JSON Schema is great. Until you have to read it.

The JSON Schema specification is designed for validation: enforcing constraints, defining required fields, setting min/max values. That makes it the right choice for API contracts and form validation. But when you just need to describe what a JSON object looks like, it produces pages of boilerplate for a simple structure.

JSON Schema (spec)

{
  "$schema": "https://json-schema...",
  "type": "object",
  "properties": {
    "name": { "type": "string" },
    "age": { "type": "integer" },
    "email": {
      "type": ["string", "null"]
    },
    "tags": {
      "type": "array",
      "items": { "type": "string" }
    }
  },
  "required": ["name", "age"]
}

Simplified schema

{
  name: string,
  age: number,
  email: string | null,
  tags: string[]
}

Same information. The simplified version is a third of the size and instantly readable without knowing the JSON Schema spec.

When to use each approach

JSON Schema (the spec)

Validation, API contracts, OpenAPI definitions, form generation, CI/CD pipeline checks. When machines need to enforce rules.

Simplified schema

Documentation, LLM prompts, PR descriptions, Slack messages, quick comprehension. When humans (or LLMs) need to understand structure.

What the generator does

Paste any JSON and the tool will analyze its complete structure. Objects are described inline. Arrays are collapsed to one representative item with optional fields marked. Types are inferred from values. Mixed types become string | null or number | string. Enable "Include examples" to see observed values alongside types.

No $schema, no properties wrappers, no required arrays. Just the structure.

Common questions

Does this generate valid JSON Schema?

No. The output is a custom simplified format, not the JSON Schema specification. If you need spec-compliant JSON Schema for validation or OpenAPI, use a dedicated JSON Schema generator.

Can I use this for API documentation?

Absolutely. The compact format works well in READMEs, wikis, and inline documentation where full JSON Schema would be too verbose.

Does it handle deeply nested structures?

Yes. The full depth is preserved. There's no truncation or flattening.

Generate a readable schema

Paste your JSON and get a schema you can actually read.

Try the generator