Kysely TypeScript Interfaces to Zod Schema Generator

Transform compile-time Kysely database table interfaces into runtime Zod validation schemas with select and insert variants.

At a glance

Kysely to Zod Schema Generator is a free developer utility that transforms compile-time Kysely TypeScript table interfaces into runtime Zod validation schemas. It unwraps Generated and ColumnType wrappers to generate dual select and insert schemas 100% client-side in browser memory.

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100% Client-Side Kysely to Zod Schema Generator

Zero Server Uploads

Transform compile-time Kysely database table interfaces into runtime Zod validation schemas with select and insert variants directly in browser memory.

Local Sandbox
Presets:
0 tables

Why Use This Kysely TypeScript Interfaces to Zod Schema Generator?

100% Client-Side Privacy: Your TypeScript interface definitions never leave your browser.
Kysely Modifier Unwrapping: Accurately unwraps Generated<T> and ColumnType<S, I, U> wrappers into select and insert schemas.
Dual Schema Generation: Automatically creates both select<Model>Schema and insert<Model>Schema for runtime validation.
Inferred Type Exports: Generates TypeScript types via z.infer for end-to-end compile-time and runtime type safety.
Enum Union Conversion: Converts TypeScript string unions into first-class Zod enum validation schemas.

How to Use Kysely TypeScript Interfaces to Zod Schema Generator

1

Input Kysely Interfaces

Paste your Kysely TypeScript table interfaces or choose a preset template.

2

Configure Options

Select insert schema generation, inferred TypeScript type exports, or date coercion.

3

Copy or Download

Copy the generated Zod validation schemas or download as a TypeScript schemas file.

Kysely to Zod Conversion example

Demonstrates converting a Kysely UserTable interface into select and insert Zod validation schemas with type inference.

Kysely TypeScript Interface Source 
export interface UserTable {
  id: Generated<number>;
  email: string;
  name: string | null;
  createdAt: ColumnType<Date, string | undefined, never>;
}
Zod Validation Schemas Processed 
export const selectUserSchema = z.object({
  id: z.number().int(),
  email: z.string().email(),
  name: z.string().nullable(),
  createdAt: z.date(),
});

export const insertUserSchema = z.object({
  id: z.number().int().optional(),
  email: z.string().email(),
  name: z.string().nullable(),
  createdAt: z.string().optional(),
});

export type User = z.infer<typeof selectUserSchema>;
export type NewUser = z.infer<typeof insertUserSchema>;

Technical Specifications & Engine Details

Technical specifications and engine details for Kysely TypeScript Interfaces to Zod Schema Generator
Specification Details
Supported Formats TYPESCRIPT, TEXT → TYPESCRIPT, TEXT
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Modern browser with JavaScript enabled.
Performance Constraints Runs 100% client-side in browser memory. Performance and file limits are bounded by available local device RAM.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your code remains strictly on your local machine. Zero telemetry or server logging.

Frequently Asked Questions

Is Kysely to Zod Schema Generator safe to use with proprietary database code?
Yes. All parsing and code generation executes 100% locally in your browser memory. No code is transmitted to any server or external service.
How does the generator handle Generated<T> and ColumnType in insert schemas?
In select schemas, Generated<T> is required because the database returns populated values. In insert schemas, Generated<T> is marked as optional because database defaults or auto-increments populate it if omitted.
Does this generator require Node.js or any external npm package at runtime?
No. The generator runs completely client-side in vanilla JavaScript with zero external runtime dependencies.

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated .

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