Best tokenizer AI tools

A free, privacy-focused online tool for accurately calculating text token counts for a wide range of Large Language Models (LLMs). It supports popular models from OpenAI, Anthropic, Meta, Mistral, and more. By performing all calculations directly in your browser, it ensures your prompts remain confidential. This is an essential utility for developers, writers, and researchers to manage LLM context windows, prevent errors, and optimize API usage without compromising data security.