Glasp

What is Glasp?

Glasp is a browser extension (Chrome, Safari, Edge, and more) for highlighting and annotating text on webpages, PDFs, YouTube transcripts, and Kindle books, then organizing everything into one searchable library tagged by source and author. Unlike private-only highlighters, Glasp is social by default: highlights are shareable by URL without requiring a login, and users can see what others have highlighted on the same page.

Its AI layer summarizes saved content, generates YouTube video summaries, and lets users "chat with their highlights" — effectively building a personal AI trained only on their own saved ideas rather than the open internet. An MCP connector exposes a user's highlight library to Claude and other AI tools directly.

Key features

• Highlight and annotate text on any webpage, PDF, YouTube video, or Kindle book
• Unlimited public highlighting for free, shareable by URL without login
• AI summarizes saved articles and generates YouTube video summaries
• "Chat with your highlights" — a personal AI trained only on your own saved content
• MCP connector exposes your highlight library to Claude and other AI tools
• Exports to Notion, Obsidian, Markdown, CSV, and JSON

How to get started

1. Install the Glasp browser extension (or mobile app)
2. Highlight text on any webpage, PDF, YouTube video, or Kindle book
3. Add notes and tags to organize highlights in your library
4. Ask the AI to summarize or chat with your saved highlights
5. Export or share highlights, or connect them to Claude via MCP

Glasp pricing

Glasp's Free plan includes unlimited public highlighting plus limited daily AI features (3 YouTube summaries, 20 PDF chat messages/month). Pro costs $15/month ($12.50/month billed annually, $150/year) and unlocks unlimited private highlights and much higher AI limits; Unlimited costs $36/month ($30/month billed annually) for the highest usage caps and priority support.

Our take: Distinctive for being social by default — highlights are public and shareable without login unless you pay for privacy — a different model from typical private note-taking and highlighting apps.

Prices verified 2026-09. Plans change often — confirm on the official site above before you buy.

Use cases

• Researchers and students collecting and organizing reading highlights for later recall
• Content creators building a personal knowledge base from saved articles/videos
• Readers wanting quick AI summaries of long articles or YouTube videos
• Power users who want their reading highlights available inside other AI tools via MCP

Glasp vs. alternatives

FAQ

Is Glasp free to use?

Glasp's plans: Free (public highlights); Pro $15/mo ($12.50/mo annual); Unlimited $36/mo ($30/mo annual). Pricing and free-tier limits change over time, so check the official site above for the latest details.

What is Glasp used for?

Social web and PDF highlighter that turns saved passages from articles, PDFs, YouTube, and Kindle into a personal AI memory.

Who is Glasp best for?

Glasp is a good fit for researchers and students collecting and organizing reading highlights for later recall, or content creators building a personal knowledge base from saved articles/videos.

What are the alternatives to Glasp?

Commonly compared alternatives include Humata, NotebookLM, and Readwise, see the comparison above for how they differ.

How much does Glasp cost?

Glasp is free for unlimited public highlighting with limited AI usage; keeping highlights private and unlocking higher AI limits requires Pro ($15/month, or $12.50/month billed annually) or Unlimited ($36/month, or $30/month billed annually).