This tool estimates how many tokens your text uses for large language models, using the common chars-per-token heuristic — in your browser.
How to use it
- Paste your prompt or text.
- An approximate token count is shown.
- Use it to stay within model limits.
About LLM Token Estimator
Large language models bill and limit by tokens, but exact counts depend on the model's tokenizer. This tool gives a quick estimate using the widely-used heuristic of about four characters per token, alongside character and word counts, so you can gauge whether a prompt fits a context window. It runs entirely in your browser.
FAQ
How accurate is the estimate?
It uses the common four-characters-per-token rule; real counts vary by model and language but it is a good guide.
Does it match a specific tokenizer?
No — it is a heuristic estimate, not a model-specific tokenizer.
Why estimate tokens?
To check prompts fit a model's context window and to anticipate usage.