Pricing: Free
Verified: Yes
Editor rating: 4.3/5
Updated: September 2026
Glasp highlights web pages, PDFs, YouTube videos with timestamp notes and builds personalized AI clones from your highlights.
Some links may be affiliate links. We may earn a small commission at no extra cost to you. Learn more
Editor-selected listing
Verified by our team
Independent & reader-supported
Editor's Verdict
Official ReviewGlasp captures highlights across web pages, PDFs, YouTube videos with timestamps, and Kindle books into a searchable personal knowledge library. The YouTube timestamp highlighting links quoted text directly to the exact moment in the video — a genuinely useful feature for researchers and learners. Chrome and Safari extensions enable in-context capture without switching tools. The personal AI Clone feature that synthesizes your highlights into responses is a premium add-on. Best for research-heavy learners and knowledge workers building a curated reading archive.
4.3 / 5.0
Editor RatingReviewed by Sohail Akhtar
Lead Editor & Founder
Pros
What we like
- Highlights web pages, PDFs, YouTube videos with timestamps, and Kindle books in one unified knowledge library
- YouTube timestamp highlights link directly to the exact video moment — makes video research as citable as text
- Chrome and Safari extension captures content in context without switching to a separate note-taking application
- Searchable highlight library makes accumulated research findable across all sources over time
Cons
Limitations
- AI Clone and advanced features require a premium plan — core highlighting is free but AI synthesis costs extra
- Value compounds over time — new users with small highlight libraries get less from the synthesis and search features
- Mobile browser highlighting support is limited compared to the desktop extension experience
Pricing
Free highlighting and basic features. Premium AI clone and advanced search.
What is Glasp?
Glasp revolutionizes knowledge capture by enabling highlighting across web pages, PDFs, YouTube videos (with timestamps), Kindle books, and social content. Researchers, learners, and professionals build searchable highlight libraries with AI-powered insights.
Chrome/Safari extensions capture key passages with notes and context automatically. YouTube timestamp highlighting links quotes to exact moments. AI Clone learns from personal highlights to provide tailored recommendations and insights reflecting individual thinking patterns.
Social highlighting enables collaborative knowledge sharing. Import Kindle highlights with daily review reminders. Export to note-taking apps preserves structure and context. Semantic search finds related highlights across sources.
Free core functionality with premium AI features. Extension-based workflow limits desktop app integration. Perfect for active reading and knowledge synthesis. Try this alternative.
Associated Tags
web highlighter ai, pdf highlighting chrome, youtube timestamp notes, kindle highlight import, ai clone personal, social highlighting, knowledge capture ai, semantic highlight search
Key Features
Web/PDF/YouTube highlighting
Timestamp video notes
Kindle import + reminders
Personal AI Clone
Social highlight sharing
Chrome/Safari extensions
Semantic search
Note export
Collaborative highlights
Daily review system
Real Use Cases
How professionals leverage Glasp AI - Web PDF Highlighter with AI Clone & YouTube Timestamp Notes
Discover practical workflows and real-world scenarios where Glasp delivers key solutions.
01
Researchers building a searchable knowledge base from web articles, academic PDFs, and video content simultaneously
02
Students capturing lecture video highlights with timestamps alongside reading notes in a unified study library
03
Writers and journalists collecting source material across formats for reference during drafting and fact-checking
04
Knowledge workers maintaining a personal research archive that accumulates searchable insight over months and years
Top Alternatives
Dedicated alternatives page →Freemium
Y2Doc
Transform any YouTube video into timestamped, structured PDF documents with AI summaries, key points extraction - lectures, podcasts, meetings to searchable notes instantly.
Free Trial
ElevenLabs Reader
ElevenLabs mobile and web app that converts articles, PDFs, ePubs, and web pages into natural AI-narrated audio, with 10 free hours per month and unlimited access on the Ultra plan.
Free
Liner AI
Liner AI is a browser-based research assistant that enables AI-powered Q&A, summarization, and insight extraction from PDFs, web pages, and documents.
Freemium
Twistly
AI presentation maker inside PowerPoint - turns prompts, PDFs, docs into pro slides with layouts/images/notes instantly.
Frequently Asked Questions
Does Glasp highlight YouTube videos?
Yes, timestamp-based highlighting links quotes to exact video moments.
What is Glasp AI Clone?
Personal AI learns from your highlights/notes to provide tailored insights and recommendations.
Can Glasp import Kindle highlights?
Yes, with daily review reminders and seamless export to other apps.