AI on every tab. Your key, your models.
Press your shortcut (Alt+Z by default) and chat with GPT, Claude, Gemini, or Grok without leaving the page. 67 models behind one OpenRouter key, paid at provider prices with no subscription on top.
Get it for $49Which tabs did I leave open on this?
• Three on OpenRouter pricing • One on model routing • Two on the extension docs
Claude Sonnet 5
Any of them bookmarked?
Two of them, both under Reading.
Claude Sonnet 5
What did the pricing pages say?
You pay providers directly. No markup in between.
Claude Sonnet 5
Chat with AI
Streaming chat with any model, switchable mid-conversation. Web search included.
Fix the spelling and grammar of: {selection}
AI Commands
Six built-in commands, or write your own using anything on the page.
Three ways to use it
Chat when you want a conversation. A quick answer when you don't. Commands when the page itself is the input.
Chat
A full chat with any model, opened on whatever tab you are in. Switch models mid-conversation. Your chats are saved and searchable.
Ask
Type a question in the launcher, hit Tab, and the answer appears without a chat window. Good for the hundred small questions a day.
Commands
Summarize the page, translate a selection, fix grammar. Or write your own reusable prompts with variables.
It can search your browser
Chat and Ask don't stop at the model's memory. The AI reaches for tools: your tabs, history, downloads, and bookmarks, plus web search, a calculator, and live currency rates. Every call shows up in the chat with what came back.
Which tab has the pricing research? And what's $49 in euros?
Searched your tabs 2 matches
Pricing research docs.google.com 
Competitor teardown notion.so Pricing research is open in your second window, the Google Doc. And $49 is about €42.16 at the current rate.
Gemini 3.6 Flash
Did the invoice from yesterday finish downloading?
Every tool is read-only. The AI can look things up. It never touches your tabs.
Commands that work on the page
Built-in commands read your selection or the page, so the prompt writes itself.
Why bring your own key?
Most AI extensions resell model access as a monthly subscription. UtilEngine doesn't. You connect your own key, pay OpenRouter or the provider directly, and the extension is a one-time purchase. If you use AI heavily, you pay for that. If you barely touch it, you pay almost nothing.
How bring-your-own-key worksAI, answered
Which AI models can I use?
67 models from OpenAI, Anthropic, Google, xAI, MoonshotAI, and Z.AI, all through one OpenRouter key that stays on your machine.
Do I pay for AI usage separately?
Yes, and that is the point. You pay OpenRouter or the provider directly for what you use, at their prices. UtilEngine takes no markup and sells no AI subscription.
Where is my API key stored?
In your browser's extension storage. Keys never sync to our servers.
Can different commands use different models?
Yes. Every AI command has its own model setting. Use a fast model for grammar fixes and a stronger one for analysis.
Does it work on any website?
Yes. The launcher opens on any page. Commands can read your selection or the page text when you ask them to.
Can the AI search the web or my tabs?
Yes. The AI has tools it can call while answering: web search, a calculator, currency conversion, and search over your open tabs, history, downloads, and bookmarks. Every tool call is shown in the chat, so you always see what it looked at.
Every model, one keystroke away
AI on every tab, plus 50+ commands. One payment, yours forever.
Get it for $49One-time payment. 14-day refund, no questions asked.
