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devvkit

devvkit / ai

LLM Token Counter

Count tokens in text for GPT-4, Claude, Llama, and other models.

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Characters

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Words

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Est. Tokens (gpt-4)

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Count tokens in your text for any major LLM including GPT-4, Claude, and Llama. Get accurate token counts, character counts, and cost estimates before sending prompts to paid API endpoints.

>[x]Features
  • -Token count for GPT-4, GPT-3.5, Claude, Gemini, and Llama
  • -Real-time counting as you type or paste
  • -Character, word, and sentence counts
  • -Cost estimation based on model pricing tiers
  • -Highlight tokens with visual tokenization
  • -Works entirely offline in your browser
>>Use Cases
  • >Estimating API costs before sending prompts
  • >Staying within model token limits for long documents
  • >Debugging tokenization differences between models
  • >Optimizing prompt length for cost efficiency

Frequently Asked Questions

>Does the token counter send my text to a server??
No, all token counting happens locally in your browser. Your text never leaves your device.
>Why do token counts differ between models??
Each model uses a different tokenizer (e.g., GPT-4 uses cl100k_base, Llama uses SentencePiece). The tool uses each model's official tokenizer.