# nanobrowser

> Open-Source Chrome extension for AI-powered web automation. Run multi-agent workflows using your own LLM API key. Alternative to OpenAI Operator.

## Facts
- **Category:** [Browser & Computer Use](https://agentsearchengine.app/category/browser-agents)
- **Type:** Agent
- **Pricing:** Open source
- **GitHub stars:** 13,516
- **Language:** TypeScript
- **License:** Apache-2.0
- **Last repo activity:** 8 months ago (Nov 24, 2025)
- **Official site:** https://nanobrowser.ai
- **Source code:** https://github.com/nanobrowser/nanobrowser
- **Listing on Agent Search Engine:** https://agentsearchengine.app/agents/nanobrowser
- **Data verified:** July 2026

## Best for
A free in-browser alternative to OpenAI Operator using your own LLM keys.

## Avoid if
You rely on small local models — they need cleaner prompts and more iterations.

## About 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. 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.

_From the project's README._

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nanobrowser sits in browser & computer use. Related tools indexed here:
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Source: [Agent Search Engine](https://agentsearchengine.app) — an independent, hand-curated index of AI agents, MCP servers, and frameworks. Rankings are never sold; sponsored placements are labeled and never numbered. Full directory: https://agentsearchengine.app/llms-full.txt