Stop Describing Your Bugs — Just Screenshot Them

This is a submission for the Gemma 4 Challenge: Build with Gemma 4

What I Built

BugLens is an AI-powered screenshot debugger for developers. You upload a screenshot of any bug, error message, or broken UI, and Gemma 4 instantly analyzes it and returns a structured diagnosis — including the error type, severity, root cause, affected area, a step-by-step fix, and prevention tips.

No more copy-pasting stack traces or describing your screen to a chatbot. Just screenshot and drop it in.

Demo

How I Used Gemma 4

BugLens is powered by Gemma 4 31B Dense (gemma-4-31b-it) via the Google AI Studio API. I chose the 31B Dense model because visual debugging demands strong reasoning — the model needs to read error text in screenshots, understand code context, and produce actionable output all in one pass.

Gemma 4's multimodal capability is the entire backbone of the app. Every analysis request sends the screenshot directly to the model as an inline image alongside a structured prompt, and the response is parsed into categorized cards in the UI. Without Gemma 4's vision and reasoning power, the app simply doesn't work — it's not a wrapper, it's the engine.