nanobrowser — what pairs with it, and why

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nanobrowser

Chrome extension running a Planner/Navigator multi-agent loop inside the browser you already use, with your own API keys — a free, local alternative to OpenAI Operator.

13,671 1,444 TypeScript Apache-2.0updated 6 days ago

web agents

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Curator's take

The lowest-friction way to get an agent driving a real, already-logged-in browser: install from the Web Store, paste keys, assign a cheap model to the Navigator and a strong one to the Planner, watch it self-correct in the side panel. Everything stays in the tab, which is exactly the tradeoff — great for privacy and for sites that demand your session, useless for headless runs, CI or fleets, and Chrome/Edge only. You are the sandbox: it can act inside every account that browser is signed into, so supervise it rather than leaving it unattended. Server-side or scripted automation belongs in a library or a CDP server instead.

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README.md

🌐 Nanobrowser

Nanobrowser is an open-source AI web automation tool that runs in your browser. A free alternative to OpenAI Operator with flexible LLM options and multi-agent system.

⬇️ Get Nanobrowser from Chrome Web Store for free

👏 Join the community in Discord | X

🌟 Loving Nanobrowser? Give us a star and help spread the word!

❤️ Support the project by sponsoring us - every contribution helps keep Nanobrowser free and open source!

Nanobrowser's multi-agent system analyzing HuggingFace in real-time, with the Planner intelligently self-correcting when encountering obstacles and dynamically instructing the Navigator to adjust its approach—all running locally in your browser.

🔥Why Nanobrowser?

Looking for a powerful AI browser agent without the $200/month price tag of OpenAI Operator? Nanobrowser , as a chrome extension, delivers premium web automation capabilities while keeping you in complete control:

100% Free - No subscription fees or hidden costs. Just install and use your own API keys, and you only pay what you use with your own API keys.
Privacy-Focused - Everything runs in your local browser. Your credentials stay with you, never shared with any cloud service.
Flexible LLM Options - Connect to your preferred LLM providers with the freedom to choose different models for different agents.
Fully Open Source - Complete transparency in how your browser is automated. No black boxes or hidden processes.

Note: We currently support OpenAI, Anthropic, Gemini, Ollama, Groq, Cerebras, Llama and custom OpenAI-Compatible providers, more providers will be supported.

📊 Key Features

Multi-agent System: Specialized AI agents collaborate to accomplish complex web workflows
Interactive Side Panel: Intuitive chat interface with real-time status updates
Task Automation: Seamlessly automate repetitive web automation tasks across websites
Follow-up Questions: Ask contextual follow-up questions about completed tasks
Conversation History: Easily access and manage your AI agent interaction history
Multiple LLM Support: Connect your preferred LLM providers and assign different models to different agents

🌐 Browser Support

Officially Supported:

Chrome - Full support with all features
Edge - Full support with all features

Not Supported:

Firefox, Safari, and other Chromium variants (Opera, Arc, etc.)

Note: While Nanobrowser may function on other Chromium-based browsers, we recommend using Chrome or Edge for the best experience and guaranteed compatibility.

🚀 Quick Start

Install from Chrome Web Store (Stable Version):
- Visit the [Nanobrowser Chrome Web Store page](https://ch

Continue your stack

What teams reach for next — and why each earns a place beside nanobrowser. Ranked by curator confidence.

Alternative to See all + compare →

browser-use

The standard library for letting AI agents drive a real browser — click, type, fill forms and complete tasks from a natural-language goal. 100k+ stars, Python.

Why it fitsSame job, opposite packaging: browser-use is a Python library you script around a driven browser (headless, CI, servers); nanobrowser is an extension that runs in the browser you're already using, with your logged-in sessions.

BrowserOS

Open-source agentic browsing, twice: BrowserClaw — a browser your MCP agent drives using your real logged-in sessions — and BrowserOS, a Chromium fork with a built-in AI agent.

Why it fitsbrowserOS forks Chromium to put the agent inside the product; nanobrowser stays a Web Store extension you can drop into stock Chrome or Edge — less control over the browser, far less to install and trust.

page-agent

Alibaba's in-page GUI agent: one script tag gives any webpage its own AI agent — users drive the interface in natural language. TypeScript, tiny bundle, Chrome extension available.

Why it fitsBoth drive the page from inside the browser rather than over CDP. page-agent plans the shortest path across existing DOM affordances; nanobrowser splits Planner and Navigator so you can assign a different model to each role.