Ever wasted hours debugging why your LLM app isn't working — only to find your API key was invalid?
LLM Key Tester solves this in seconds.
Paste any key from OpenAI, Anthropic, Google, Mistral, Groq & more — instantly know:
✅ Is the key valid?
✅ Which models it has access to?
✅ How keys compare model-wise?
🔒 Key is NEVER stored or logged — ever.
🆓 No signup. No credit card. Lifetime free.
⚡ Results in under 3 seconds.
Built for devs tired of guessing.