What is Nanobrowser used for?

Nanobrowser is an open-source Chrome extension that runs multi-agent AI web automation in your browser using your own LLM API key. It is a good fit for automating repetitive web tasks and research tasks across websites.

Is Nanobrowser open source?

Yes. Nanobrowser is open source under the Apache-2.0 licence. Its source code is on GitHub at nanobrowser/nanobrowser and is written mainly in TypeScript.

Yes. Nanobrowser is open source, so the software itself is free to use.

Can I self-host Nanobrowser?

Yes. Nanobrowser can be self-hosted on your own server or infrastructure; there is no official hosted version.

What is Nanobrowser an alternative to?

Nanobrowser is an open-source alternative to ChatGPT Atlas, Perplexity Comet, Dia and Bardeen. Other open-source alternatives to ChatGPT Atlas include BrowserOS, Ego Lite and Browser Operator.

Is Nanobrowser actively maintained?

Yes. The most recent commit to Nanobrowser was on 18 August 2026, and the latest release is v0.1.13, published on 22 November 2025. The project has 14k stars on GitHub.

Nanobrowser: open-source alternative to ChatGPT Atlas

About Nanobrowser

Nanobrowser is an AI web automation tool delivered as a Chrome extension. You describe a task, and a team of AI agents carries it out in your browser. The project presents itself as a free, open-source alternative to OpenAI Operator, with the flexibility of choosing which language model provider you use.

Its multi-agent design splits the work: a Planner analyzes the task and corrects course when it runs into obstacles, while a Navigator carries out the steps on web pages. Everything runs locally in the browser, and you supply your own LLM API key, so there is no required vendor account. Topics mention browser automation, Playwright and n8n. It is available from the Chrome Web Store and is written in TypeScript.

Nanobrowser is licensed under Apache-2.0. It suits people who want agentic browsing and web task automation with their own model keys, without handing control to a hosted browser agent. Support comes from community sponsorship and a Discord server.

Key features

Chrome extension for AI web automation
Multi-agent Planner and Navigator system
Bring your own LLM API key
Runs locally in your browser
Self-correcting task execution
Available from Chrome Web Store

Good fit for

→Automating repetitive web tasks
→Alternative to hosted browser agents
→Research tasks across websites

Built with: TypeScript
Tags: browser-automation; ai-agents; chrome-extension; web-automation; multi-agent; llm; typescript

Nanobrowser: questions and answers

What is Nanobrowser used for?: Nanobrowser is an open-source Chrome extension that runs multi-agent AI web automation in your browser using your own LLM API key. It is a good fit for automating repetitive web tasks and research tasks across websites.
Is Nanobrowser open source?: Yes. Nanobrowser is open source under the Apache-2.0 licence. Its source code is on GitHub at nanobrowser/nanobrowser and is written mainly in TypeScript.
Is Nanobrowser free?: Yes. Nanobrowser is open source, so the software itself is free to use.
Can I self-host Nanobrowser?: Yes. Nanobrowser can be self-hosted on your own server or infrastructure; there is no official hosted version.
What is Nanobrowser an alternative to?: Nanobrowser is an open-source alternative to ChatGPT Atlas, Perplexity Comet, Dia and Bardeen. Other open-source alternatives to ChatGPT Atlas include BrowserOS, Ego Lite and Browser Operator.
Is Nanobrowser actively maintained?: Yes. The most recent commit to Nanobrowser was on 18 August 2026, and the latest release is v0.1.13, published on 22 November 2025. The project has 14k stars on GitHub.