What is LINER?
Liner is an AI-powered copilot that integrates directly into your browser, helping you digest information and accelerate your research across any webpage, PDF, or YouTube video. It's designed for students, researchers, and professionals who need to find accurate answers and key insights without the friction of switching between multiple tabs and tools.
Key Features
Liner embeds a powerful AI assistant into your existing workflow, allowing you to work smarter, not harder.
💬 Instant AI Search on Any Page Ask complex questions and get immediate, context-aware answers from the AI copilot without ever leaving your current page. This allows you to clarify concepts or dive deeper into a topic in real-time as you read or watch.
📄 Summarize Web, PDF & YouTube Content Instantly generate concise summaries of long articles, dense academic papers, or lengthy YouTube videos. Liner extracts the most critical points, saving you valuable time and helping you quickly assess if the content is relevant to your needs.
✍️ Highlight and Capture Insights Actively engage with your material by highlighting key sentences and ideas directly on the page or video timeline. Liner saves these highlights, transforming passive consumption into an active learning process and ensuring you never lose a valuable insight.
📚 Bookmark and Organize Your Research All your summaries and highlights are automatically organized in one central, accessible location. This feature acts as your personal knowledge base, making it easy to manage your findings, connect ideas, and revisit important information whenever you need it.
How Liner Solves Your Problems:
For the Student: Imagine you're researching a complex historical event with ten browser tabs open. Instead of reading every word, you use Liner to get a quick summary of each article. On the most promising sources, you ask the Copilot clarifying questions like, "What were the primary economic factors leading to this event?" and highlight the key arguments for your essay.
For the Professional: You receive a 50-page industry report in PDF format just before a meeting. You can use Liner to generate an executive summary and key takeaways in under a minute. This allows you to walk into the meeting fully prepared and confident, having grasped the report's core message without spending hours reading it.
For the Curious Learner: You're watching a two-hour-long YouTube tutorial on a new software. With Liner, you can ask, "Show me the part where the presenter explains data export," and get a direct link to that timestamp. You can also get a summarized transcript to quickly review the main steps later.
Unique Advantages
Liner is designed to fundamentally improve your research workflow, not just add another tool to it. Its key advantage lies in its seamless integration.
Work Where You Are: While many AI tools require you to copy-paste text into a separate application, Liner works directly on top of the content you're already viewing. This eliminates disruptive context switching and keeps you focused.
Beyond Text Articles: Unlike traditional "read-it-later" apps or summarizers that are limited to text, Liner extends its powerful AI capabilities to PDFs and, uniquely, to the content within YouTube videos.
Freemium Accessibility: Liner makes its core, powerful features—AI Chat, Summarizer, and Highlighter—available for free in its Basic plan, providing immediate value without a financial commitment.
Get Started with Liner Today!
Stop drowning in information and start extracting knowledge with precision and speed. All the core features are available for free, with advanced options like expanded AI model access and file uploads available for professional users.
More information on LINER
Launched
2014-12
Pricing Model
Free Trial
Starting Price
Global Rank
9270
Follow
Month Visit
8.7M
Tech used
Google Ads,Google Analytics,Google Tag Manager,Google Fonts,Next.js,Google Cloud Platform,Emotion,HTTP/3,OpenGraph,Webpack,Apple App Banner
Top 5 Countries
32.92%
29.71%
9.99%
6.75%
1.54%
Korea, Republic of
United States
Philippines
India
China
Traffic Sources
0.88%
0.37%
0.04%
2.89%
40.47%
55.34%
social
paidReferrals
mail
referrals
search
direct
Source: Similarweb (Sep 24, 2025)
LINER was manually vetted by our editorial team and was first featured on 2023-06-09.
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