Liner AI

Liner AI is a browser extension-based research tool that activates AI capabilities directly within the document or web page a user is reading. Rather than requiring the user to copy text and paste it into a separate AI interface, Liner AI surfaces a conversational sidebar within the document environment where users can ask questions, request summaries of specific sections, extract key claims or citations, and build notes from the content in view. The tool supports PDFs, web pages, and academic papers, and maintains conversation context across a reading session so users can ask sequential, connected questions about the material without reestablishing context each time. Citation tracking allows the tool to reference the specific document location where information was found rather than summarizing without attribution. Liner AI is used by academic researchers conducting literature reviews who want to quickly identify whether a paper contains relevant information before reading it in full, students working through course readings and research assignments who need to extract and understand key points efficiently, business analysts reviewing market reports and technical documentation who want to surface specific data or conclusions quickly, and legal and compliance professionals navigating long regulatory or contract documents who want to locate relevant clauses without manual searching. A common workflow involves opening a PDF or web article, activating the Liner AI sidebar, asking a targeted question about the document's content, and building a note or export from the AI-generated answer with the source location cited. Read our guide. Liner AI's primary advantage is eliminating the copy-paste step that characterizes most existing workflows for applying AI to document research — the interaction happens within the document context, which preserves the relationship between the AI output and the source material. The tool is available as a browser extension. Key limitations include a current availability primarily on Chrome, which restricts use for researchers working on Firefox, Safari, or other browsers. Document size and complexity can affect processing for very long materials, and content behind paywalls or login systems that the browser cannot access will not be processable regardless of the extension. Users should verify current pricing and premium feature availability at liner.ai, as the platform may offer both free and paid access tiers Browse tools.