The Polkadot-JS Apps is a flexible UI for interacting with a Polkadot or Substrate based node. Go to documentation.

This is pre-built user-facing application, allowing access to all features available on Substrate chains.

To connect the Polkadot-JS Apps to your local node, you must go into Settings and change the "endpoint to connect to" to Local Node (

If you are connected to the Polkadot-JS Apps over a secure HTTPS connection, you will need to use a browser which also supports bridging to an insecure WebSocket endpoint. For example, Google Chrome supports this, but Mozilla Firefox does not.

Polkadot-JS extension

The Polkadot-JS Extension is a simple proof-of-concept for managing accounts in a browser extension and allowing the signing of extrinsics using these accounts. It also provides a simple interface for interacting with extension-compliant dApps.

Different ways to use the extension: