BTC EXT is a Chrome extension developed by justintormey that offers convenient xpub access for Bitcoin users. With this extension, users can easily manage their xpub addresses, receive Bitcoin, and create payment labels directly in their browser.

BTC EXT functions as a read-only wallet, providing users with a limited set of features. It allows users to view their addresses and receive Bitcoin, but does not support sending transactions.

One of the key advantages of BTC EXT is its open-source nature. The extension's source code is available on GitHub, allowing users to review and verify the code for added security and transparency.

Overall, BTC EXT is a handy tool for Bitcoin enthusiasts who want quick and easy access to their xpub addresses and basic wallet functionality within their Chrome browser.