Chrome Extension

Context without clutter.

You're reading. A term catches your eye — the urge to open a new tab creeps in, and you know where that leads.

Gutter kills that friction. AI lives on your mouse pointer now — Alt+Click any heading, bold text, or selected passage. Get two sentences. Return to what you were doing.

Add to Chrome — Free See how it works

Bring your own Gemini API key. No subscription. No data sold.

Live Demo — Click Any Underlined Phrase

During the Age of Discovery, European powers raced to map the globe and control its wealth. Bartolomeu Dias first rounded the southern tip of Africa in 1488, proving a sea route to Asia existed, before Vasco da Gama completed the full voyage to India. Armed with dead reckoning and the astrolabe, Portuguese sailors navigated far beyond sight of land aboard caravel ships. Their success dismantled the Ottoman Empire's grip on overland routes, handing Portugal a monopoly over the spice trade.

// click any underlined phrase to see Gutter in action

How it works

Three steps. Zero friction.

Install Gutter from the Chrome Web Store and open the extension options. Sign in with Google and paste your Gemini API key — available free from Google AI Studio.

Alt+Click any heading, bold text, or selected passage on any webpage. A tooltip appears inline — no new tab, no context switch.

Read two sentences. What it is. Why it matters. The tooltip closes. You're back where you were.

Security & Trust

Your API key is yours.

Gutter uses a bring-your-own-key model. You connect your own Gemini API key — we never have access to your account or quota. Here is exactly what happens to your key.

Encryption at rest

Your API key is encrypted with AES-256-GCM before being written to the database. The raw key never touches storage.