[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Owner](https://evolu.dev/docs/api-reference/common/local-first/Owner) › mnemonicToOwnerSecret

```ts
function mnemonicToOwnerSecret(
  mnemonic: string & Brand<"Trimmed"> & Brand<"MinLength1"> & Brand<"Mnemonic">,
): Uint8Array<ArrayBufferLike> &
  Brand<"Entropy"> &
  Brand<"Length32"> &
  Brand<"OwnerSecret">;
```

Defined in: [packages/common/src/local-first/Owner.ts:156](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Owner.ts#L156)

Converts a [Mnemonic](https://evolu.dev/docs/api-reference/common/Type/variables/Mnemonic) to an [OwnerSecret](https://evolu.dev/docs/api-reference/common/local-first/Owner/variables/OwnerSecret).