MARK•R

AI browser plugin — highlight any webpage text to instantly chat with it, get explanations, summaries, and insights.

mark-r.com

Verified API available Free tier

Quick facts
What is it	AI browser plugin — highlight any webpage text to instantly chat with it, get explanations, summaries, and insights.
Pricing	Freemium
Free tier	Yes
Platform	Chrome Extension
API	Yes
Best for	academic research and study assistance, content creation and writing improvement
Domain registered	2024

Data updated Aug. 1, 2026

What does MARK•R do?

MARK•R is a browser extension that transforms how you interact with web content. Instead of just reading passively, you can highlight any text on any webpage and instantly engage with it through a conversational AI interface. This allows you to ask questions, request explanations, get summaries, or explore topics in depth without leaving the page you're viewing. It's like having a research assistant available on every website you visit.

The tool uses advanced AI to understand not just the highlighted text but the full context of the webpage, ensuring responses are relevant and comprehensive. When you highlight text, a small icon appears that opens a chat interface where you can type natural language questions. The AI then provides detailed answers, explanations, or can even help generate content like executive summaries or presentation ideas based on the page content.

MARK•R is particularly valuable for students conducting research, professionals analyzing technical documents, and content creators looking to deepen their understanding of topics or generate new ideas. It turns the entire web into an interactive learning environment where you can immediately clarify confusing concepts, get alternative explanations, or explore related topics without interrupting your workflow.

Assistant Knowledge Management Other Productivity Tools

#ai chat#browser extension#content analysis#research assistant#text highlighting#web-productivity

Key features

What makes it stand out

Contextual AI responses based on entire webpage content

One-click text highlighting to activate AI chat interface

Generates summaries, explanations, and content ideas

Works on any website without switching tabs

Personalized learning and research assistance

Who is MARK•R for?

Who benefits most from this tool

academic research and study assistance

content creation and writing improvement

technical document analysis and explanation

Pricing

Free tier available — start without a credit card

Free

15 calls per day
1,000 output characters
500 text field characters
2,000 highlighted characters
AI Model GPT-3.5

Standard

Custom

100 calls per day
1,200 output characters
700 text field characters
2,500 highlighted characters
AI Model GPT-3.5 & GPT-4

Pro

Custom

150 calls per day
2,000 output characters
1,500 text field characters
5,000 highlighted characters
AI Model GPT-3.5 & GPT-4

Trust & presence

Domain Domain registered 2024

Gallery

Click any image to enlarge

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