TokenLens for Claude – Usage & Limit Tracker

Real-time token usage, context window, rate limits & 5 hour/7 day quotas — directly inside your chat.

TokenLens shows your Claude usage limits and session stats live, inside the chat. See how much of your 5-hour and 7-day allowance you've used and exactly when it resets, without leaving the conversation or opening a settings page. It answers the questions every regular user asks: How much of my limit is left? When does it reset? Is Claude slow because of peak hours? How full is my context window? FEATURES • 5-hour and 7-day usage limits: live progress bars with a countdown to each reset • Context window meter: an estimate of how full the current conversation is, so you can start a fresh chat in time • Peak-hour indicator: shows whether you're in the weekday peak window (Mon–Fri, 5–11 AM PT, converted to your local time in the tooltip) and counts down until it ends • Token, speed and latency stats: live token count, tokens per second and average time to first token • Cost estimate: approximate API-rate cost of the conversation (a reference figure; subscription plans are flat-rate) • Light and dark themes that match the Claude interface, with the TokenLens interface available in 9 languages HOW IT WORKS Install it, open claude.ai, and the meters appear automatically. Works on free and paid plans. Nothing to configure and no account to create. WHO IT'S FOR Daily users who keep hitting the limit mid-task, developers watching token usage, and anyone in long conversations who wants to see the context window fill up before it becomes a problem. PRIVACY TokenLens runs only on claude.ai and reads the same usage data your account already loads there. It has no analytics or tracking and doesn't send anything to its developer or any third party. Settings and recent values stay in your browser's local storage. Permissions used: access to claude.ai pages (to display the meters) and local storage. TokenLens is an independent project and is not affiliated with or endorsed by Anthropic. Claude is a trademark of Anthropic.