PluginStats
WebBrain users statistics
Open-source AI browser agent — chat with pages, automate tasks, multi-provider LLM support.
WebBrain has approximately 2,000 recorded users on Chrome Web Store, ranking #670 of 2,495 tracked listings.
Rating: 4.00 / 5 from 23 ratings
About WebBrain
Open-source AI browser agent — chat with pages, automate tasks, multi-provider LLM support.
WebBrain is a free, open-source browser extension that brings AI agent capabilities to Chrome. Read pages, extract data, and automate web tasks, powered by your choice of LLM. The self-hostable alternative to proprietary browser AI plugins.
And when the network goes away, it keeps working.
Key Features:
- Page Understanding: Reads and comprehends any web page, from articles and docs to dashboards and forms
- Full Browser Agent: Click, type, scroll, navigate, and interact with pages on your behalf
- Data Extraction: Pull structured data off any page, including tables, lists, links, and forms
- Multi-Provider LLM: Works with local LLMs (LM Studio, Ollama, llama.cpp) and leading cloud providers (OpenAI, Anthropic Claude, Gemini, OpenRouter, and more)
- Privacy First: Your data stays yours. Run with a local LLM for zero data leakage
- Smart Context: Automatic context management prevents token overflow
Apocalypse Mode: Optional and off by default. Turn it on and WebBrain installs what it needs to answer questions with no internet at all: an on-device text model, an on-device vision model, and a Wikipedia archive in the openZIM format used by Kiwix.
- Offline Wikipedia: Pick a language and edition, from a compact Simple English archive to a full edition with images, and read articles in a built-in reader
- Emergency Box: A field library of curated PDFs covering OpenStax textbooks, emergency health guides, and field manuals, each downloaded only when you ask for it
- Offline Answer Engine: Local search across your installed archives, so answers quote the passages they came from and link back to a source you can open and check
- Emergency Communication: A word board covering 110 everyday concepts across 1,756 languages, built from the public-domain PanLex Swadesh Corpus, for when you need to be understood without a shared language
- Stays on your device: Once a component is installed, questions, retrieval, and answers all run locally
Local models need a browser with WebGPU. Archives range from a few hundred MB to tens of GB, so WebBrain shows the exact size, source, and license and asks before downloading anything.
Interaction Modes:
- Ask Mode: Read-only questions about current page
- Act Mode: Full agent with browser control for automation
License: MIT License Developer: Emre Sokullu GitHub: https://github.com/webbrain-one/webbrain
Categories: Productivity, Developer Tools, AI/Machine Learning
For the full changelog, check out https://github.com/webbrain-one/webbrain/blob/main/CHANGELOG.md
Description from the Chrome Web Store listing.
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Charts
Images: 30d · 1y · all time · 1600×900 dark
Adoption over time
7/30/90-day growth
Ranking history
Ratings over time
Listing placement
Listing placement
Filled points are observed values; hollow points come from Internet Archive snapshots of the listing page. Dashed segments span periods with no observations — values between points are not interpolated.
Each band is one page of 20. Users on a linear scale. Placement is projected from users, so it can differ from the marketplace's own sort order. Hover a dot to see the listing.
Recent observations
Full history (1)Similar Chrome Web Store Tools plugins
All 20 WebBrain alternatives
Data source
Covers every Chrome Web Store extension with at least 100 users, found through the store's public sitemap. User counts are read from public listing pages. The 10% most-used extensions are refreshed daily, the next 40% weekly and the next 40% monthly; the least-used 10% are not refreshed. Google displays rounded user counts (and caps the display at 10,000,000+), so small changes may not be visible. Rating counts above 1,000 are rounded (e.g. 1.6K).
Listing: https://chromewebstore.google.com/detail/webbrain/ljhijonmfahplgbbacgcfnaihbjljhhb. First seen Oct 20, 2026; last successful collection Oct 20, 2026. See the methodology.