I Built an AI Token Calculator Because Long Prompts Need a Sanity Check

I keep running into the same small problem when working with LLMs: a prompt looks fine in a text editor, but I still need to know whether it is going to fit inside the model context window before I send it. That is why I added a new tool to Tools Online: AI Token Calculator. It is a browser-based token and context estimator for common AI models. You can paste a prompt, code snippet, document section, or chat draft, pick the provider/model you care about, and see the token count plus context usage immediately.