LLM Token Counter
Calculate token usage across major AI language models
Target Audience
- LLM Application Developers
- AI Research Teams
- API Cost Optimizers
Hashtags
Overview
Helps developers and AI users manage token limits for popular language models like GPT-4 and Claude 3. Works directly in your browser without sending data to servers. Essential for avoiding unexpected LLM errors and maintaining privacy.
Key Features
Multi-LLM Support
Works with 25+ models from OpenAI, Anthropic, Meta, Mistral
Client-Side Processing
No data leaves your device for maximum privacy
Real-Time Calculation
Instant token counts as you type or paste text
Cross-Platform Access
Web-based tool works on any modern browser
Use Cases
Optimize LLM prompts for token limits
Budget API costs accurately
Compare token usage across models
Ensure compliance with model constraints
Pros & Cons
Pros
- Supports newest models (GPT-4o, Claude 3.5)
- Zero data transmission ensures confidentiality
- Lightning-fast Rust-based calculations
- No login or installation required
Cons
- No API for batch processing/integration
- Browser-only (no offline desktop version)
- Lacks cost estimation features
Frequently Asked Questions
Is my prompt data safe?
Yes, all calculations happen in your browser - no data is sent to servers.
Which models are supported?
Currently supports OpenAI, Anthropic, Meta, and Mistral models including GPT-4o, Claude 3.5, and Llama 3.
How accurate are the token counts?
Uses official Transformers.js library matching each model's tokenization method.
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