TokenMonitor is a Chrome add-on designed to enhance the ChatGPT experience by providing a real-time monitor for token usage. It helps users manage their token limits effectively, which is crucial for maintaining context and coherence in longer conversations. With features like a color-coded alert system and a movable overlay panel, users can easily track their token consumption without disrupting their workflow. The add-on aims to prevent common issues such as context loss or broken reasoning chains that can occur when reaching token limits.

The add-on offers a PRO version with additional features such as one-click chat export options in Markdown or HTML, snapshot alerts for token limit warnings, and unlimited token analytics for enhanced control and productivity. It operates on a subscription model with various pricing options, including monthly, yearly, and lifetime plans. Importantly, TokenMonitor ensures user privacy by not collecting or transmitting ChatGPT messages, performing all token analysis locally within the browser.