Free AI Prompt Counter & Token Estimator
Paste any AI prompt and instantly see word count, character count, estimated tokens, keyword density, and a prompt-quality score. Built for ChatGPT, Claude, Gemini, Midjourney, Stable Diffusion, Runway, and other AI tools.
Keyword density
Top 8Add a prompt to see your top keywords.
How to use this AI prompt counter
Paste your prompt into the editor above. The tool updates your word count, character count, estimated token count, keyword density, and prompt score in real time. Use the model selector to see how close your prompt is to the context limit of ChatGPT, Claude, Gemini, Midjourney, or any other model.
You can clean unnecessary spaces, change case, copy the final prompt, or download it as a text file. The tool runs entirely in your browser — your prompt is never uploaded to a server.
What is an AI prompt counter?
An AI prompt counter measures the length and structure of the instructions you send to AI systems. It helps prompt writers, marketers, developers, and creators understand how long a prompt is before sending it to ChatGPT, Claude, Gemini, Midjourney, Stable Diffusion, Runway, Kling, or other AI tools.
Prompt length matters because very long, vague, or repetitive prompts can make a model harder to guide. A strong prompt usually contains five parts: the task, the context, the constraints, the output format, and an example when useful.
Estimated tokens vs exact tokens
Every AI model tokenizes text a little differently. ChatGPT uses one tokenizer, Claude another, Gemini another. This tool uses a calibrated heuristic — roughly 4 characters per token for English, 1.5 characters per token for Chinese, with adjustments for digits and punctuation. It is fast, free, and accurate enough for sizing prompts before sending. For exact billing-grade counts, use each provider's official tokenizer.
FAQ
- What does estimated token count mean?
- It's an approximation of how many tokens an AI model will use to process your prompt. Different models tokenize differently, so this tool gives you a fast practical estimate rather than an exact value.
- Is this tool free?
- Yes. The AI Prompt Counter is free to use. You can count words, characters, estimated tokens, keyword density, and prompt structure without creating an account.
- Do you store my prompt?
- No. The tool runs entirely in your browser. Your prompt is not sent to a server. If autosave is on, it's stored only in your browser's local storage.
- Can I use this for Midjourney or Stable Diffusion prompts?
- Yes. The tool works for text prompts, image prompts, negative prompts, video prompts, and structured prompt templates. Select the corresponding model from the dropdown for relevant context limits.
- Why does my prompt score look low?
- The score looks for clarity signals — a clear action verb, output format, context, constraints, examples, and absence of heavy repetition. The hints in the score panel tell you what's missing.