Free LLM cost & key-security tools

All of these run entirely in your browser. Nothing you paste is sent anywhere — check your network tab.

Incident tools

• API key format checkerPaste a key prefix to identify the provider, the key type, and what it can do. Runs entirely in your browser — nothing is transmitted or stored.
• Leaked API key — interactive response checklistA working checklist for a compromised AI API key. Pick your provider, work the steps in order, and print or share the result. Nothing is transmitted.

Cost tools

• LLM cost calculatorEnter your token volumes and see the monthly cost on every current model, cheapest first. Runs in your browser, priced from a dated source-linked table.