TypeScript Utility Types That Save You Time

TypeScript ships a toolbox of type transformations. Knowing them means writing less and enforcing more.

Partial, Pick, and Omit

Partial makes all properties optional — great for update payloads. Pick and Omit let you create derived types from existing ones without repeating fields.

Record and Readonly

Record builds object types from keys and values, while Readonly prevents accidental mutation of configuration objects.

Exclude, Extract, and Promise

These handle type-level filtering and async unwrapping. Awaited gives you the resolved type of a promise without fiddly infer.

Wrapping up

Utility types turn tedious type definitions into one-liners and keep your models as the single source of truth.