MARZAI Token Calculator
Estimate how many tokens your text will use for GPT and Claude-style models.
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About this tool
Paste text to estimate the number of tokens it will consume, using an accurate client-side tokenizer for OpenAI-style models and a character-ratio approximation for other model families.
How to use
- Paste your text or prompt into the input box.
- Select the model family (OpenAI-style exact tokenization, or approximate for others).
- View the estimated token count.
FAQ
Is the token count exact?
For OpenAI-style models it uses the real tokenizer running locally, so it's exact. For model families without a public tokenizer, it uses a documented character-to-token approximation (roughly 4 characters per token), clearly labeled as an estimate.
Does my text get sent anywhere?
No, tokenization runs entirely in your browser via a WASM tokenizer — your text never leaves your device.