Drizzle ORM Schema to JSON Schema Converter
Instant in-browser Drizzle ORM schema parser and JSON Schema Draft 2020-12 / Draft-07 generator with inverted nullability.
At a glance
Drizzle ORM Schema to JSON Schema Converter parses pgTable, mysqlTable, and sqliteTable definitions into Draft 2020-12 and Draft-07 JSON Schema with inverted nullability (.notNull() to required array) entirely in browser memory.
100% Client-Side Drizzle to JSON Schema Converter
Zero Server UploadsParse Drizzle ORM schema tables (pgTable, mysqlTable, sqliteTable) into standard JSON Schema (Draft 2020-12 & Draft-07) with inverted nullability.
Schema Parsing Error
Inverted Nullability Semantics
Drizzle ORM columns are nullable by default, whereas JSON Schema properties are optional by default. The converter checks for .notNull() modifiers and maps them directly into the parent JSON Schema "required": [...] array.
Multi-Dialect Compatibility
Seamlessly extracts tables across PostgreSQL (pgTable), MySQL (mysqlTable), and SQLite (sqliteTable). Maps dialect-specific column helpers such as serial, uuid, jsonb, and mysqlEnum.
Draft 2020-12 & Draft-07
Output models as modular $defs (for modern validators like Fastify and Ajv 8+) or legacy definitions (for OpenAPI 3.0 and Draft-07 tools) with single-click conversion.
Why Use This Drizzle ORM Schema to JSON Schema Converter?
How to Use Drizzle ORM Schema to JSON Schema Converter
Input Drizzle Schema
Paste your Drizzle ORM TypeScript code or upload a .ts file into the editor.
Configure Output Draft
Select Draft 2020-12 ($defs) or Draft-07 (definitions) and desired indentation.
Copy or Download
Copy the generated JSON Schema to your clipboard or download schema.json immediately.
Drizzle ORM to JSON Schema Conversion example
Demonstrates automated extraction of a Drizzle pgTable into a JSON Schema with inverted required arrays based on .notNull() modifiers.
export const users = pgTable('users', {
id: serial('id').primaryKey(),
name: text('name').notNull(),
email: text('email').notNull(),
bio: text('bio')
});
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "User",
"type": "object",
"properties": {
"id": { "type": "integer" },
"name": { "type": "string" },
"email": { "type": "string" },
"bio": { "type": "string" }
},
"required": ["name", "email"]
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Drizzle Dialects | PostgreSQL (pgTable), MySQL (mysqlTable), SQLite (sqliteTable) |
| Supported JSON Schema Drafts | Draft 2020-12 ($defs), Draft-07 (definitions) |
| Execution Mode | 100% Client-Side In-Browser (Zero server latency) |
| Nullability Mapping | Chained .notNull() → required array, unchained → omitted |
| Constraint Extraction | serial(), varchar length to maxLength, timestamp to date-time, enums |
100% Client-Side Privacy Guarantee
Your files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
How does Drizzle to JSON Schema handle nullability and optional columns?
Which Drizzle ORM dialects can be converted?
How are enum columns translated into JSON Schema?
What is the difference between Draft 2020-12 and Draft-07 output?
Methodology
Validates inverted nullability, primary key detection, column types, enums, and drafts without external dependencies or sponsored ranking.
Last updated .