Free tool
AI Token Counter
Paste any prompt or document and get an instant token estimate for ChatGPT, Claude, Gemini and other LLMs — plus character and word counts. Free, private, runs entirely in your browser.
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Tokens (est.)
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Characters
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Words
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Chars / token
Estimates use the standard ≈4-characters-per-token heuristic, accurate within ~10–15% for English text on GPT and Claude tokenizers. For exact counts, use each provider's tokenizer API.
Frequently asked questions
How accurate is this token counter?
It is typically accurate within 10-15% for English text. The counter blends the standard 4-characters-per-token approximation with a word-based estimate. For exact counts use your provider's official tokenizer.
Is my text sent to a server?
No. The counter runs entirely in your browser using JavaScript. Nothing you paste is transmitted, logged or stored anywhere.
What is a token in AI?
A token is the unit of text an AI model processes — roughly 4 characters or 0.75 words in English. Models price by token and limit context by token, so counting them matters for both cost and fit.