NanoFocus turns any article into a clean summary in seconds, using Chrome's built-in Gemini Nano. No API key, no signup, no servers. Your reading stays on your device.
Pick the summary shape that fits how you read. NanoFocus produces all four modes from the same article, so you can switch without re-running the page.
One or two sentences that capture the main argument. The fastest way to decide if the rest of the article is worth your time.
A single paragraph of three to six sentences. Reads like a confident overview, not a bullet list. Best for sharing into chat or notes.
Top-level points with indented sub-bullets underneath. Captures the article's structure when the original argument has real branches.
The most important facts and takeaways as a flat list. Great for research, study, or piping into a notes app.
Each mode also runs in three lengths: Short, Medium, and Long.
Most summarizer extensions paste your article into someone else's cloud LLM. NanoFocus doesn't. Summarization runs locally on your device using Chrome's built-in Summarizer API and the Gemini Nano model.
Article text never leaves the browser. There's no server to log it, no API key to leak, no third-party analytics watching what you read.
Verify it yourself: open DevTools, watch the Network tab, click Summarize. You'll see no requests to any LLM endpoint. The only network call NanoFocus ever makes is to ExtensionPay (only when you upgrade to Pro), and that call doesn't include any article content.
From "what is this article about" to a clean summary in three clicks.
News, blog post, Wikipedia page, documentation. Anything Chrome can read.
The NanoFocus side panel opens. Pick a mode and length, or use your saved defaults.
Streams in within seconds, on-device. Copy it, export to Markdown, or compare two modes side by side.
Free tier covers the basics. One-time Pro unlocks everything, forever.
No subscription. No renewal email. One-time payment via ExtensionPay (Stripe).
Yes. NanoFocus uses Chrome's built-in Summarizer API, which routes inference to the local Gemini Nano model. You can verify by opening DevTools and watching the Network tab while you summarize an article. There are no requests to any LLM endpoint.
Any Chromium-based browser running Chrome 138 or newer that ships the Summarizer API. That includes Chrome, Edge, Brave, Arc, and Opera. Firefox and Safari don't currently expose an on-device LLM API. If you're not sure your browser is ready, see the setup guide.
The free tier is genuinely free, no time limit. Pro covers the cost of building, supporting, and shipping updates as the on-device AI ecosystem evolves. $9.99 is a one-time payment, not a subscription. If you use the free tier and never upgrade, that's fine.
Long articles are split into Nano-sized chunks at sentence boundaries, summarized independently, then merged into one cohesive summary. A 19,000-word Wikipedia article is summarized in roughly 30 to 90 seconds, with status updates as each chunk completes.
Uninstall any time from chrome://extensions. ExtensionPay handles Pro payments and supports refunds within a reasonable window. Reply to your Stripe receipt and a real human at Loophead Labs reads it.
After Chrome has downloaded the Gemini Nano model on first use, summarization runs entirely offline. You can summarize on a flight, on a train, anywhere. The marketing site itself is online, but the extension's runtime is not.