Lumen

About

Lumen

Lumen is a desktop AI assistant for Windows and macOS that reads what is on your screen and answers questions about it. Lumen is a desktop AI assistant for Windows and macOS. Press Ctrl+Space, drag a box over anything on screen, and Lumen reads it and answers - solving errors, explaining code, and summarising documents and PDFs. Lumen sits directly on top of your work. Press Ctrl+Space over any app to explain, solve, or summarize what you see — without switching context. Free to start · No credit card required · Windows 10/11 & macOS Choose what you need help with. Lumen captures the exact pixels on your screen and outputs actionable answers without switching windows. Highlight a stack trace, syntax error, or broken function. Lumen identifies the root cause and outputs the corrected code block ready to copy and paste. Three quick actions between hitting a blocker and getting back to work. Recording a tutorial, presenting to clients, or on a live video call? Lumen tells your operating system to hide its screen from capture, so your answers and overlay never leak into recordings. Excluded from Zoom · Microsoft Teams · Google Meet · OBS Studio · Loom · Slack Huddles Start with free everyday screen selection and problem solving. Upgrade to Pro for 20x capacity and Stealth Mode.