Claude Tokenizer

A client-side tool to estimate token counts and costs for Claude models.

Features

• Model-specific token estimation
• Real-time cost calculation
• Token visualization
• No API keys required

Live Demo

Try it now on Claude.ai →

or

Usage

Just open tokenizer.html in your browser!

Note

The pricing data is hardcoded and will need updates when Anthropic changes their pricing.

Note

If viewing via Claude artifact and the GitHub link isn't responding, try:

• Right-clicking and selecting "Open in new tab"