Token counts can feel abstract until the boundaries are visible. This small browser tool lets you enter text and inspect how it is split into tokens—the units that affect model context, cost, and truncation.

Try the tokenizer.

Why I built it

I wanted a simple way to make a foundational language-model concept tangible. It is deliberately narrow: one task, immediate feedback, and no account or personal data required.

Evidence

The Simple LLM Tokenizer interface showing text input and token output