Overview
Tiktokenizer is a free, browser-based tool that lets you visualize and count tokens for OpenAI's language models using the tiktoken tokenizer.
Built for developers and AI practitioners, it helps you:
- Count tokens in real-time for any prompt or text input
- Visualize token boundaries with color-coded highlighting
- Support multiple models including GPT-4o, GPT-3.5-turbo, and more
- Compose multi-turn messages with System/User/Assistant roles
- See raw token IDs for debugging and research
No signup required. Works entirely in the browser with zero backend calls.
Perfect for prompt engineers who need to stay within context window limits, developers building LLM-powered apps, and anyone curious about how language models tokenize text.
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