Data Type & Constraint Blueprint Engine

CSV Schema Generator

Infer data types, nullability, and field constraints from your CSV to export JSON Schema, TypeScript interfaces, and SQL DDL tables.

Drop your CSV file here to generate schema

Infers types and builds Draft-07 JSON Schema or TypeScript interfaces.

JSON Schema Draft-07 Blueprint 0 fields inferred

What schema definition formats can I generate from my CSV?

The generator produces Draft-07 JSON Schemas, TypeScript interfaces, SQL CREATE TABLE DDL blueprints, and OpenAPI 3.0 schema definitions.

How does the tool determine if a column is required or nullable?

The schema engine scans every row in the dataset; if any cell in a column is empty or null, the property is marked as optional/nullable.

Is my data sent to an external server during schema inference?

No. All type inference algorithms and schema code generation run 100% inside your local browser memory.