I have k8s cluster installed with tiller and many charts , how can I download and view the charts installed on existing cluster
You can not download the whole chart from your Kubernetes cluster, as it only stores the applied resources, with already replaced values. Instead, you can download the release with helm get command.
helm get [flags] RELEASE_NAME
This command shows the details of a named release.
It can be used to get extended information about the release, including:
The values used to generate the release The chart used to generate the release The generated manifest file By default, this prints a human readable collection of information about the chart, the supplied values, and the generated manifest file.