Swiss-Knife is a free Chrome extension designed to optimize the Ethereum experience for users. It offers a range of tools that simplify interactions with Etherscan and other Ethereum Virtual Machine (EVM) explorers. A standout feature is the 'Decode Calldata' button, which allows users to view complex transaction parameters in an easily understandable format directly within the Etherscan transaction pages. This feature enhances clarity and understanding of blockchain transactions, making it accessible to both novice and experienced users.

Additionally, Swiss-Knife provides a convenient shortcut for users. By typing 'sk' in the address bar followed by a tab, users can quickly access any Ethereum address, ENS, or transaction across numerous EVM explorers and dashboards. The extension also allows users to paste any calldata, which can then be decoded via the Universal Calldata Decoder on the Swiss-Knife website, streamlining the process of analyzing Ethereum transactions.