BraceKit

Bring your own API keys. Private AI sidebar with page reading, selection tools, conversation branching, and MCP. BraceKit is a private AI sidebar for Google Chrome. Chat with models you already pay for—cloud APIs or local runtimes—without leaving the page.

The extension is free. There is no BraceKit subscription and no bundled AI quota. You add your own API keys (bring your own key). Keys stay on your device, encrypted. Optional PIN lock. No BraceKit account and no telemetry.

WHAT YOU CAN DO

• Read the current page into clean markdown (ads and chrome stripped) so the model sees the article, docs, or ticket you are looking at.
• Select text anywhere and use the floating toolbar: Summarize, Explain, Translate, Rephrase, Simplify, Expand, Fix grammar, plus your own prompts. Apply the result into editable fields.
• Attach images and text files. Vision-capable models can debug a UI from a screenshot.
• Type bk in the address bar, then a query, to start a chat or jump to an old one.
• Branch a conversation to try another approach without losing the original thread.
• Build slide decks in the sidebar: plan, edit, and export from a dedicated slide workspace.
• Generate images (including aspect ratio) and browse them in the gallery.
• Connect local MCP servers so the model can use your tools from the sidebar.
• Keep preferences and project notes in a local memory system; auto-compact long threads so you stay under context limits.
• Keep chatting after you close the sidebar—the agent loop runs in a service worker.

HOW KEYS WORK

You choose the endpoint. BraceKit talks to it from your browser. You pay that provider at their rates. BraceKit does not proxy your prompts through BraceKit servers.