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Build an AI Chrome Extension
A real, shippable AI sidebar for any webpage — Chrome Web Store or side-load
1 phase. 5 lessons. 5 labs. Build and ship a real Chrome extension: an AI sidebar with one-click summarization, page Q&A, structured data extraction, and fact-checking — built with WXT and Manifest V3, shipped to the Chrome Web Store or packaged for sharing.
5 lessons · 5 labs · 4 AI features · 1 shippable extension
Outcomes you will have by the end
- A real, shipped Chrome extension — Either live on the Chrome Web Store with a real listing, or packaged with clear install instructions someone else actually followed — not just running in your own developer-mode Chrome.
- A working mental model of Manifest V3 architecture — Popup, service worker, content script, and side panel — 4 isolated contexts and the message-passing that connects them, the exact architecture behind every serious Chrome extension.
- A reusable AI-feature-in-a-product-shell pattern — Ship the shell first, wire features one at a time, choose streaming vs. structured-JSON per feature deliberately — this pattern generalizes to any AI product surface, not just extensions.
- Verified certificate of completion — Issued by DeVenture Academy, tied to your completion record. Lists the product-scoping, extension-architecture, and shipping skills you built.
What you will be able to do
Manifest V3 Architecture · Product Shell Design · Content Script Extraction · Streaming AI Features · Chrome Web Store Publishing
Every phase, every lesson, every project
- Build an AI Chrome Extension (5 lessons) — Manifest V3 architecture and product scoping, the product shell, content scripts for page reading, wiring 4 AI features with streaming, polish and Chrome Web Store publishing
The technologies you will use
WXT · React · Anthropic Claude API · Chrome APIs
Roles this course prepares you for
- Indie Extension Developer ($0-10k+/mo depending on adoption) — Build and monetize consumer-facing AI Chrome extensions — top AI extensions have millions of users and real revenue from freemium or subscription models.
- Freelance Extension Builder ($1,000-5,000/project) — Build custom internal or client-facing Chrome extensions that bring AI features into existing workflows without a full web app.
- Frontend / Product Engineer (Varies by employer) — Bring the same shell-first, feature-by-feature shipping discipline into any product surface, not just extensions.
Common questions
Do I need Chrome extension experience?
No. This course assumes basic JavaScript/TypeScript and walks through Manifest V3 architecture from scratch, including the exact message-passing patterns that confuse most first-time extension builders.
Does publishing to the Chrome Web Store cost money?
Yes, a one-time $5 developer registration fee, plus a review process that can take hours to days. Lesson 5 covers a free, immediate alternative (side-loading) if that timeline or fee doesn't fit your goals.
Why WXT instead of raw Manifest V3 configuration?
WXT handles the Webpack/bundling complexity and gives you a clean entrypoints/ convention (popup, background, content, side panel) that maps directly onto the 4 architectural contexts this course teaches — you learn the real MV3 concepts without hand-writing build tooling.
What do I end up with?
A real, working Chrome extension with 4 AI features (summarize, Q&A, extract, fact-check), either published to the Chrome Web Store or packaged for side-loading with install instructions someone else can actually follow.
Key terms in this course
ReAct · Streaming
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