AI Prompt Token Counter
Estimate how many tokens a prompt will use and check it against common model context limits.
This is an approximation based on average characters and words per token — actual tokenizers vary by model and can differ by 10–20% from this estimate, especially for code or non-English text.
Overview
Before sending a long prompt to an AI model, it helps to know roughly how many tokens it'll use — both for staying under context limits and estimating API cost.
- Instant estimate as you type or paste
- Progress bars against common model context windows
- No API calls or account needed
How to use it
- 1Paste your prompt
- 2Read the estimated token count
- 3Check it against the context limit of the model you're using
Frequently asked questions
Is this an exact token count?
No — real tokenizers vary by model and split text differently, especially for code, punctuation, and non-English languages. This gives a solid estimate, typically within 10–20% of the actual count.
Why does token count matter?
Language models have a maximum context length measured in tokens, and API pricing is usually based on token count rather than characters or words.