Glasp

Glasp

Freemium

Social web and PDF highlighter that lets you build an AI clone from your highlights, share learning publicly, and summarize YouTube videos with AI.

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What is Glasp?

Glasp (Greatest Legacy Accumulated as Shared Proof) is a social web highlighter and knowledge management tool trusted by over 1 million researchers, writers, and lifelong learners. With its Chrome and Safari browser extension, users can highlight text on any webpage or PDF, add notes, timestamp YouTube videos, and import Kindle highlights, all of which feed into a personal knowledge base. What sets Glasp apart is its AI clone feature: the platform learns from your highlights and notes to build a personalized AI writing partner that can continue paragraphs, suggest ideas, and reflect your reading patterns through the Hatch feature. Highlights are public by default, enabling social discovery where users can follow others and learn from their curated knowledge feeds. Glasp integrates with Obsidian, Notion, Roam Research, and Readwise for seamless export in Markdown format, making it a popular choice in the personal knowledge management community.

Key Features

Web Page HighlightingPDF AnnotationYouTube Video Highlighting with TimestampsAI YouTube SummarizationKindle Highlights ImportAI Clone BuilderHatch AI Writing AssistantSocial Learning FeedFollow Other ReadersQuoteshot CreatorMarkdown ExportReadwise IntegrationNotion ExportObsidian ExportRoam Research ExportPrivate Highlights ModeKnowledge Graph VisualizationCross-Device Sync

How to Use Glasp

1Install the Glasp Chrome or Safari extension and create a free account
2Highlight any text on a webpage or PDF and add notes directly inline
3Import Kindle highlights or summarize YouTube videos with one click
4Build your AI clone as your knowledge base grows through continued highlighting
5Share your public profile or export highlights to Notion, Obsidian, or Readwise

✅ Best For

  • Content creators, writers, and bloggers who highlight extensively across articles and research, and want an AI writing partner trained on their specific reading patterns to help draft new content faster.
  • Lifelong learners and knowledge management enthusiasts who want to build a public digital legacy of curated insights, follow other readers in their niche, and discover content through social highlights.
  • Graduate students and researchers who read across many online sources and want a single place to collect, organize, and export annotated highlights to their Obsidian or Notion knowledge bases.

❌ Not For

  • Researchers who need to annotate locked PDFs behind paywalls or work primarily within offline documents, since Glasp works as a browser extension and requires web access to highlight and save content.
  • Teams needing a private, enterprise-level knowledge base with access controls, since Glasp's highlights are public by default and its collaboration tools are designed for open social sharing rather than private workgroups.

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Pricing

Free$0
  • ✓Core highlighting
  • ✓YouTube summaries
  • ✓public profile
  • ✓basic exports
ProCustom
  • ✓Unlimited highlights
  • ✓private mode
  • ✓advanced AI tools
  • ✓priority support
StudentDiscounted
  • ✓40% off Pro yearly with valid .edu email

Prompts to Try

Summarize this YouTube lecture on quantum mechanics for me

What are the key themes across all my highlights tagged behavioral economics?

Generate a paragraph continuing from my highlights on climate policy

Use Cases

A science writer uses Glasp to highlight 20 articles on AI regulation over a week, then uses her AI clone to generate a first draft of a newsletter section based entirely on her own curated insights, cutting her writing time by half.
A startup founder highlights competitor blog posts and investor reports as he reads, and exports all tagged highlights to Obsidian nightly, building a searchable competitive intelligence database without any manual note-taking.
A PhD student follows three leading researchers in her field on Glasp and discovers two highly relevant papers through their public highlights that she had missed in her own literature searches.
A high school teacher uses Glasp's YouTube summarizer to extract key concepts from a 45-minute documentary before class, generating a concise summary she uses to create discussion questions for her students.
A knowledge management consultant builds his public Glasp profile as a curated reading portfolio, sharing it with potential clients as evidence of his expertise in organizational psychology.

Frequently Asked Questions