What is E-Brain?
E-Brain is an AI dictionary Chrome extension that explains highlighted words and phrases in context, directly on the page you are reading. When you select text, it sends the term plus the surrounding context to Google's Gemini AI and returns a plain-English explanation along with similar words, shown in a draggable pop-up next to your cursor. It is designed for readers who run into internet slang, technical jargon, or unfamiliar vocabulary while browsing and want a quick definition that accounts for how the word is actually being used, rather than a generic dictionary entry. E-Brain uses a Bring Your Own Key (BYOK) model: you supply your own free Google Gemini API key through the extension's options, and your data is stored locally on your device without third-party sharing. This makes it a fit for students, language learners, and anyone reading dense or slang-heavy content online. The extension is at an early stage (version 1.0.0) and currently has no Chrome Web Store ratings, so it is best treated as a lightweight, privacy-conscious reading aid.
What is E-Brain used for?
Explaining highlighted slang and jargon in context while browsing
How much does E-Brain cost?
Pros and cons
Pros
- Highlight any word or phrase to get an instant in-context explanation
- Uses surrounding page context, not just a generic dictionary lookup
- Results appear in a draggable pop-up beside the cursor
- Data is stored locally with no third-party sharing
- Free to install with a Bring Your Own Key (Gemini) model
Cons
- Requires you to obtain and configure your own Google Gemini API key
- Early release (v1.0.0) with no Chrome Web Store ratings yet
- Chrome extension only — no mobile or other-browser support shown
Questions about E-Brain
What is E-Brain used for?
E-Brain is a Chrome extension that gives instant, context-aware AI definitions for words and phrases you highlight while browsing, helping decode slang, jargon, and unfamiliar vocabulary on the page.
Is E-Brain free?
Yes, the extension is free to install. It uses a Bring Your Own Key model, so you provide your own free Google Gemini API key to power the explanations.
Does E-Brain keep my data private?
E-Brain stores your data locally on your device and states it does not share data with third parties; explanations are generated through your own Gemini API key.
How does E-Brain explain words in context?
When you highlight text, E-Brain sends the term along with the surrounding text to Google's Gemini AI, so the explanation reflects how the word is used on that page rather than a generic definition.
What are the best alternatives to E-Brain?
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