Estimate token counts for GPT, Claude, Gemini, Llama and Mistral — instantly, in your browser.
A privacy-first token counter that approximates how many tokens any prompt or document will use across the major LLM families. Uses each vendor’s documented chars-per-token rule of thumb. Runs entirely client-side — your prompts never leave the browser. For exact billing use the official tokenizer (tiktoken, Anthropic SDK).
Got questions? We’ve got answers. Here are some of the most common inquiries about LLM Token Counter.
Token counter
Approximation only. For exact counts use the official tokenizer (tiktoken, Anthropic SDK, etc.).
Why approximations differ
Each LLM family uses its own BPE vocabulary. Real token counts depend on punctuation, language, and special characters. Use these numbers for budgeting, not billing.