Highlight, annotate, and summarize the web — and build a public knowledge base from everything you read.
Glasp is a web highlighter with a social twist. Highlight any article or YouTube video, and your highlights become part of a public 'knowledge base' others can follow. It's the fastest way to capture what you read, get AI summaries, and build a second brain that compounds over time.
Who it's for: Knowledge workers, students, and content creators who read a lot online and want their highlights to be findable — and shareable.
Highlight any webpage or YouTube transcript directly in your browser. Glasp auto-syncs the surrounding text and timestamps.
One click generates a TL;DR of any page or video using GPT-4. Perfect for triaging long reads before committing.
Your highlights publish to a public Glasp profile. Follow other readers and inherit their curated knowledge bases.
Import Kindle highlights and sync with Readwise to unify every highlight you've ever made in one searchable place.
Glasp is the best free way to actually retain what you read in 2026. Turn on the private option if you're shy, but the public knowledge base is where the magic is. Pair it with Zotero for citation-heavy work.