LLM Token Counter — Free Online Tool

Calculate token counts for your prompts and text using OpenAI's tiktoken library. Supports multiple LLM models including GPT-4, GPT-3.5, Claude, and Gemini.

Supported Models

• GPT-4o & GPT-4o-mini
• GPT-4 Turbo & GPT-4
• GPT-3.5 Turbo
• Claude models
• Gemini models

How Token Counting Works

Tokens are the basic units that LLMs use to process text. Roughly:

• 1 token ≈ 4 characters
• 1 token ≈ 0.75 words

This tool uses the official tiktoken library from OpenAI for accurate tokenization.

Why Count Tokens?

• Estimate costs: Most LLM APIs price by token
• Stay within limits: Different models have different context windows
• Optimize prompts: Reduce token count to save money and improve response time

Privacy

All token counting happens in your browser. Your text is never sent to any server.