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Open OS AI Browser Extension

Puts a chat interface for your local Ollama models, from Llama to Mistral, right in the browser.

Checked 4 Oct 2026 Reviewed by Alex Listed since September 2024

Screenshot of Open OS AI Browser Extension

At a glance

Starts at Free No paid plan found on the Chrome Web Store, September 2026.
Free tier Yes
Platforms Chrome
Best for Privacy-minded users already running local Ollama models
Not for Anyone without Ollama installed already

4.3 out of 5

Scored by Alex after real use

Our verdict

This is a lightweight front end for Ollama: it connects to any local or remote Ollama server and lets you chat with whichever model you've pulled, from Llama 3 to DeepSeek, with streaming responses and full Markdown. Extras like six built-in themes and an experimental persona injection feature add some personality on top of a fairly plain chat window. There's no telemetry and no account required, but you still need Ollama itself installed and a model downloaded before the extension does anything at all.

✓What it does well

Works with any Ollama modelIt connects to Llama 3, Qwen, Gemma, Mistral, DeepSeek, and any other model you've pulled into Ollama.
Remote host supportYou can point it at a remote Ollama server instead of only the local machine.
No accounts or telemetryIt runs with no sign-up and no external servers, keeping conversations local by design.

✕Where it falls short

Needs Ollama installedIt requires Ollama already installed and a model pulled before it's of any use.
No cloud modelsIt only talks to local or self-hosted Ollama models, not hosted services like ChatGPT or Claude.
Small developer, few reviewsIt's built by a single independent developer and has only three ratings so far.

Key features

Multi-model chatYou can switch between installed Ollama models on the fly.
Streaming responsesReplies render token by token with full Markdown support.
Persona injectionAn experimental mode injects AI personalities like HAL 9000 into conversations.
Custom themesSix built-in themes cover looks from light modern to retro terminal.

Questions about Open OS AI Browser Extension

What is Open OS AI Browser Extension?

Open OS AI Browser Extension is a Chrome extension that puts a chat interface for Ollama models in the browser. It connects to a local or remote Ollama server and lets users chat with any model they have pulled, from Llama 3 to DeepSeek, with streaming responses and full Markdown support.

Do you need Ollama to use Open OS AI Browser Extension?

Yes, Open OS AI Browser Extension requires Ollama to be installed and a model downloaded before it does anything at all. It only talks to local or self-hosted Ollama models and cannot connect to hosted services like ChatGPT or Claude. Toolio lists anyone without Ollama already installed as a poor fit.

Does Open OS AI Browser Extension collect any data?

Open OS AI Browser Extension has no telemetry and needs no account or sign-up. It runs without external servers, keeping conversations local by design. Toolio names privacy-minded users who already run local Ollama models as its best audience.

How much does Open OS AI Browser Extension cost?

Open OS AI Browser Extension is free, priced at $0, and no paid plan was found on the Chrome Web Store in September 2026. Ollama itself must be installed separately. Toolio gives the extension a score of 4.3 out of 5 after real use by Alex.

What are the downsides of Open OS AI Browser Extension?

The reviewer notes that Open OS AI Browser Extension is built by a single independent developer and has only three ratings so far. Its chat window is fairly plain, with six built-in themes and an experimental persona injection mode adding some personality. It also cannot use cloud models.

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