About This Tool

This token counter was built for developers and teams who work with AI APIs daily and need a quick way to estimate token counts and costs across multiple providers — without switching between different tools or docs pages.

100% Client-Side

All text processing happens in your browser. No text is sent to any server, API, or third party. There is no backend. Your content stays on your device.

How Token Estimation Works

Each AI provider uses a different tokenizer with different vocabulary sizes and encoding strategies. We use calibrated characters-per-token ratios for each provider family:

• OpenAI (GPT-4, o-series): ~3.9 characters per token
• Anthropic (Claude): ~3.8 characters per token
• Google (Gemini): ~4.0 characters per token
• Meta (Llama): ~4.1 characters per token
• Mistral: ~4.0 characters per token
• DeepSeek: ~3.5 characters per token

These ratios are calibrated against each provider's official tokenizer for English text. Accuracy is typically within ±10%. For code, structured data, or non-Latin scripts, variance may be higher.

Pricing Data

API pricing is sourced from each provider's official pricing pages and was last verified in September 2026. Prices change periodically — always confirm with the provider before making budget decisions.

Supported Models

We cover the most widely used models from OpenAI, Anthropic, Google, Meta, Mistral, and DeepSeek. New models are added as they become available.

Contact

Questions or feedback? Reach us at the feedback link in the navigation.