About This Tool

Tokens are how language models process text. Whether you're using GPT-4o, Claude, Gemini, or Llama, understanding token counts is crucial for managing API costs and optimizing prompt engineering. This free token counter estimates how many tokens any text will consume across the major AI models — no signup, no upload, entirely in your browser. Use it to validate prompt length, calculate API costs, or debug tokenization issues.

Common Uses

  • Calculate API costs before making requests
  • Optimize prompts for token efficiency
  • Debug tokenization across different models
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Token Counter

Paste any text and see token counts for GPT, Claude, Gemini, and Llama. Runs entirely in your browser — your text never leaves the page.

10 words53 characters44 no-space

Estimated tokens

  • GPT-4o / 4.1 / o-seriesOpenAI · cl100k
    13
  • Claude (Sonnet / Opus / Haiku)Anthropic
    15
  • Gemini 2.5 / 1.5Google
    13
  • Llama 3.1 / 3.2Meta
    14

Estimates are within ±5% of the official tokenizers for English prose. Code, JSON, and non-Latin scripts will tokenize higher than shown.

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Frequently Asked

How accurate are the token estimates?
Estimates are within ±5% of official tokenizers for English prose. Code, JSON, and non-Latin scripts will tokenize higher than shown.
Why do different models have different token counts?
Each model uses its own tokenizer. GPT uses cl100k (newer: o200k), Claude uses its own vocab, Gemini and Llama differ as well. We support the latest versions.
Can I use this offline?
Yes. All tokenization runs in your browser — your text never leaves the page.
What's the difference between tokens and characters?
Roughly, one token ≈ 4 characters or ¾ of a word for English text. Tokens are what AI models "see" and what you pay for in API requests.