Debug at the
speed of thought.
Lumen lives inside Chrome DevTools. Inspect elements, explain errors, and run AI-generated code directly on the page.
Run on page — AI writes code, you click Run. Executes in the live page context.
Inspect elements — attach any DOM element as context with one click.
6 AI models — Gemini, GPT-4o, o4-mini. Switch with one click.
Credits roll over — unused credits carry into next month. Forever.
Free plan — 100 credits/month, no credit card required.