ai
AI Token Counter
Estimate tokens for ChatGPT, Claude, and Gemini prompts in your browser. Plan context length before you hit send.
Estimates only — real tokenizers differ by model. Useful for prompt budgeting before you paste into ChatGPT, Claude, or an API.
15Est. tokens
9Words
57Characters
How to estimate AI tokens
Large language models bill and limit usage by tokens, not words. Exact counts depend on each model’s tokenizer. This tool gives a fast browser-side estimate so you can budget prompts and replies.
Steps
- Paste your prompt or the model’s reply into the box.
- Pick the model family that best matches what you use.
- Read the estimated token count, words, and characters.
- Shorten the prompt if you are near a context limit.
Tips
- English text is often ~4 characters per token for GPT-style models; other languages can differ.
- System prompts and tool schemas also consume tokens in real APIs.
- For billing-critical work, verify with the vendor’s official tokenizer.
Frequently asked questions
Is this the official OpenAI tokenizer?
No. It is an approximation that runs locally. Official libraries may return a slightly different number.
Does my text get uploaded?
No. Counting happens in your browser. Nothing is sent to our servers for this tool.
Why estimate tokens at all?
Token limits and API pricing are based on tokens. Estimating early prevents truncated answers and surprise bills.