ghostreindeer09/token-meter-dist

Token Meter is a Chrome browser extension that shows you, in real time, how many tokens your message will use as you type into ChatGPT, Claude, or Gemini. A token is the small chunk of text that these AI systems actually count against their limits, and this tool gives people a live view of that count directly inside the chat box, along with a free way to trim unnecessary wording from a prompt before sending it. There is also an optional feature that rewrites your prompt using AI to shorten it further, which requires entering your own Anthropic API key. Once installed as an unpacked extension in Chrome's developer mode, a small badge appears in the corner of the chat box on each supported site. Clicking it opens a panel showing the tokens in your current draft, the tokens already used across the whole visible conversation, an assumed limit for that site, and how many tokens remain. For ChatGPT and Gemini specifically, it also estimates roughly how many more back and forth exchanges could fit before hitting that limit, based on the average size of previous messages in the conversation. This particular countdown is intentionally left out for Claude, because the extension's assumed limit is about the size of a single conversation, while what actually matters for Claude users day to day is a separate quota tied to their plan, and showing an unrelated number next to it would be confusing rather than helpful. Counting is exact for ChatGPT using the same tokenizer OpenAI publishes, while Claude and Gemini use an estimate built from character and word counts, since neither company publishes their tokenizer. The free trimming feature works entirely offline using simple rules like collapsing extra whitespace and removing filler phrases, with no data sent anywhere unless the optional AI rewrite feature is used.