jose/docs/functions/key_export.exportPKCS8.md
2021-11-10 15:20:12 +01:00

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# Function: exportPKCS8
**exportPKCS8**(`key`): `Promise`<`string`\>
Exports a runtime-specific private key representation (KeyObject or CryptoKey) to an PEM-encoded PKCS8 string format.
**`example`** Usage
```js
const pkcs8Pem = await jose.exportPKCS8(privateKey)
console.log(pkcs8Pem)
```
#### Parameters
| Name | Type | Description |
| :------ | :------ | :------ |
| `key` | [`KeyLike`](../types/types.KeyLike.md) | Key representation to transform to an PEM-encoded PKCS8 string format. |
#### Returns
`Promise`<`string`\>