Free AI Developer Tools
Discover free AI tools to calculate tokens, estimate API costs, format prompts, optimize prompt quality, and improve your AI workflows.
AI Token Calculator
Calculate AI tokens, estimate API costs, measure prompt length, monitor context window usage, and compare token counts across OpenAI GPT, Claude, Gemini, DeepSeek, and other leading AI models.
AI API Cost Calculator
Calculate and forecast monthly AI API spend across OpenAI, Anthropic, Google, DeepSeek, Meta, and Mistral models before execution.
AI Prompt Formatter
Format AI prompts, organize system instructions, improve prompt readability, and automatically clean embedded JSON, SQL, XML, YAML, Markdown, and code blocks without changing the original content.
Prompt Optimization Score
Analyze AI prompt quality, evaluate clarity, context, constraints, and structure, then receive an instant 0–100 Prompt Optimization Score with actionable recommendations to improve AI responses.