Free tools
Free AI calculators and generators: estimate API costs, automation ROI and EU AI Act risk, or build better prompts. No sign-up, runs in your browser.
LLM API Cost Calculator
Estimate what an LLM API costs per request, month and year. Compare three price scenarios side by side and turn sample text into a token estimate.
AI Automation ROI Calculator
Calculate the ROI of automating a task with AI: hours saved, net monthly benefit, payback period and first-year return, including review time and running costs.
AI Prompt Generator
Build clear, structured prompts for ChatGPT, Claude, Gemini and other AI assistants from role, task, context, format and rules. Free, with ready-made templates.
EU AI Act Risk Checker
Answer a few questions to see which EU AI Act risk category your AI system likely falls into and which obligations apply. Free orientation, not legal advice.