Token Meter for Claude

See how many tokens your message and Claude's reply will likely use — before you hit send.

Token Meter adds a small, draggable widget to claude.ai that estimates token usage before you hit send, so a long task doesn't run out of context partway through. It shows: - Your message's token count, live as you type - A predicted reply size, as a calibrated range (not a misleading single number) - A context-window bar — how much of the window your conversation has used, and whether your next exchange will fit - A "plenty of space / getting close / may not fit" badge How the prediction works: - A small neural network predicts reply length from your prompt's wording and any size you ask for ("300 tokens", "2 pages"). - It personalizes to you: after each reply it compares its guess to the actual length and adapts, getting more accurate the more you use it. - Reply length is genuinely variable, so it reports a calibrated range rather than pretending to know the exact number. Privacy: everything runs and stays on your device. Your conversations are never sent to the developer or any third party. No analytics, no servers. Not affiliated with, endorsed by, or sponsored by Anthropic. "Claude" is a trademark of Anthropic, used here only to describe compatibility.