Welcome to PromptBurn, a free developer utility dedicated to helping AI engineers, startups, and content creators estimate, analyze, and optimize their Large Language Model (LLM) token usage.

Our Mission

As artificial intelligence becomes central to modern software, managing API costs across models like OpenAI GPT-4o, Anthropic Claude 3.5, and Google Gemini is critical. PromptBurn provides instant, client-side token estimation and prompt compression without storing or logging your proprietary prompts.