Count tokens instantly on any webpage. Calculate costs for GPT-4, Claude, Gemini, and more—right from your browser.
Select any text on any webpage and get instant token counts. Works with emails, docs, chat interfaces, and more.
See exact API costs for GPT-4o, Claude Sonnet, Gemini, and 100+ models. Make informed decisions before making API calls.
Copy text with automatic token metadata. Paste into your favorite AI tools with full context awareness.
Track your token usage over time. Set budgets and get alerts when approaching limits.
Beautiful interface that adapts to your browser theme. Easy on the eyes during late-night coding sessions.
All processing happens locally in your browser. Your text never leaves your device.
One-click install from your browser's extension store. No signup required.
Highlight any text on any webpage. A small popup appears with token count.
See token counts, costs for different models, and copy with metadata.
Extension screenshot coming soon
Yes! The TokenCalculator browser extension is completely free. All features are available at no cost.
Yes. All tokenization happens locally in your browser using WebAssembly. No internet connection required for token counting.
We support 100+ models including GPT-4o, GPT-4, Claude Sonnet, Claude Opus, Gemini 2.0, Llama 3, and many more. The model list is regularly updated.
Absolutely. Your text never leaves your browser. All processing happens locally. We don't collect, store, or transmit any of your content.
Join thousands of developers, writers, and AI enthusiasts using TokenCalculator Extension