The Gmail Emotion Checker is a Chrome extension designed to help users avoid sending emotionally charged emails. It detects excessive punctuation and capitalization, providing alerts or blocking messages that may come across as unprofessional. This tool is particularly beneficial for professionals and customer service teams who want to maintain a calm and composed tone in their communications.

Key features include counting exclamation marks and detecting overuse of capital letters, with customizable sensitivity settings. Additionally, it offers contextual GIFs as warnings and can randomly block one out of ten emails for those who need a moment to rethink their message. Overall, this extension serves as a helpful reminder to pause and refine emails before hitting send.