Local Browser AI
Using the new Prompt API to build a free open source privacy-first chat extension that runs on Chrome or Edge on Linux, Mac, Windows and ChromeOS
Local Browser AI launched on October 13, 2025 with 15 votes, #661 of 8,178 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Local Browser AI is a free, open-source chat extension for Chrome and Edge browsers that runs on Linux, Mac, Windows, and ChromeOS. Built using the Prompt API, it prioritizes privacy by processing conversations locally on the user's device rather than sending data to external servers. The extension is designed for users who want AI assistance while maintaining control over their personal information.
written from the facts on this page · September 2026
From the sources
This page explains how to use the new Prompt API to run Small Language Models in the browser. It pairs with a Github repo that contains example codes and a fully functional and free open source browser extension. Learn the difference between Cloud AI and Edge AI with illustrations and understand the 3 options available to build ai-powered web apps: 1. local server, 2. language model library, 3. Pr
Subscribe Sign in Code Introducing: Local Browser AI Using the new Prompt API for local chat in the browser Alex Ewerlöf Oct 13, 2025 15 3 Share Up until recently, running language models in the browser was hard. With the introduction of Prompt API, browsers manage the complexity behind a simple idiomatic JavaScript API. Local Browser AI is a browser extension that demonstrates that power right in your computer now! This post drills down the technical details of Edge AI (running small language models) right inside the browser with tips and tricks to build a mental model for creating AI-powered web apps. Clone the repo (MIT license) although it’s better to read this post to understand how it…from blog.alexewerlof.com
Does a similar job
all alternatives →
ChatGPT Chrome Extension2022 · chromewebstore.google.com · ▲372Access OpenAI's ChatGPT anywhere on the web
Open Source AI Chrome Extension2025 · github.com · ▲87Chrome extension allow the user to communicate with the AI
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