MARK•R
Highlight and interact with web content via AI.
At a glance
Starts at
Free, limited features
Price as published by the vendor, September 2026.
Free tier
Yes, limited
Platforms
Web
Best for
Students, researchers, marketers
Not for
Content creators with extensive needs
4.0 out of 5
Scored by a Toolio reviewer after real useOur verdict
Enhances learning, research, and engagement with web content. Not ideal for casual browsing or technical users needing complex features.
✓What it does well
Interactive LearningAsks questions and provides personalized explanations.
Efficient ResearchSummarizes key points directly from content.
Customized FeedbackOffers tailored responses for better understanding.
✕Where it falls short
Limited AI ModelsUses only GPT-3.5 and sometimes GPT-4, but not both at once.
Character LimitsHas strict limits on highlighted characters (up to 5000).
Higher Costs for More FeaturesMore expensive plans offer more calls but still have character limits.
Key features
AI InteractionHighlights text and activates AI-powered conversation.
Context AnalysisCultivates insights from the entire webpage context.
Note-Taking & SummarizationAssists in creating notes and summaries from content.
More AI ModelsSupports both GPT-3.5 and GPT-4 separately