Instant analysis - 100% client-side

AI Token Calculator

Paste or type your text and see in real time how many tokens it consumes. See exactly how AI splits your content.

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How does tokenization work?

AI models don't read text like humans. They split content into tokens — pieces of words, whole words, or even spaces and punctuation. In English, 1 token is approximately 4 characters. Token count determines usage cost and context limit for each model.

This tool uses an estimate based on the BPE (Byte Pair Encoding) algorithm, similar to the cl100k_base tokenizer used by GPT-4. Accuracy is approximately 95%.