CogniSphere
A desk lamp lighting a printed article on a dark desk. One sentence is highlighted in blue, the CogniSphere toolbar sits above it and an answer card explains it.

Ask any page a question.

Add to Chrome

Works with the model you already use

  • Gemini
  • OpenAI
  • Claude
  • DeepSeek
  • Grok
  • OpenRouter
  • Ollama
  • Chrome on-device AI

Highlight. Tap. Read.

  1. Highlight. Select any passage.

  2. Tap. Explain, Summarize, Translate, Improve, Ask.

  3. Read. The answer streams in beside it.

Stays out of the way.

wolfram.com/mathworld/riccati
Side Panel with Native LaTeX Math
One-Click Page Summaries
Choose Your Preferred Model
Chat with Any Webpage Content

  • Your own buttons

  • Rendered math

  • Any page

  • On your terms

Your key. Your browser. Your data.

No CogniSphere AI service. Your browser talks to your provider directly.

What we never receive

  • Your API keys
  • The pages you read
  • Your questions and answers

Works fully signed out.

Free to use. Paid to support.

Free

$0forever

Everything CogniSphere does today, at no cost.

  • Full webpage analysis and Q&A
  • Bring your own API key
  • Gemini, DeepSeek, OpenRouter, Ollama
  • Keys stay on your device
Install the extension

Pro

Coming soon

Paid plans will fund ongoing development and introduce account-level perks.

Planned Perks
  • Account sync across devices
  • Priority email support
  • Early access to new features
  • PRO badge in the panel

Compare plans

Point it at the next page you don't quite follow.

Add to Chrome — freeOr read the guide first