# pulumi preview

> Show a preview of updates to a stack's resources.
> More information: <https://www.pulumi.com/docs/iac/cli/commands/pulumi_preview/>.

- Show a preview of updates to a stack's resources:

`pulumi preview`

- Show a preview of updates to a stack's resources in JSON format:

`pulumi preview --json`

- Preview updates as a rich diff showing overall changes:

`pulumi preview --diff`

- Display help:

`pulumi preview --help`