Nami is a browser-based extension that allows users to interact with the Cardano blockchain on every website. It injects an API into every website's javascript context, so that all websites and web applications can interact with the Cardano blockchain and control their assets. It enables users to interact with the blockchain directly in the browser, even after the Alonzo hard fork. Nami supports multiple assets, delegation to pools, and minting.

You can do a lot of things with it. For example, you can send delegations to pools, create multiple sigs, send assets and get them back. They are stored only on the users computer and they are encrypted with the wallet password.