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Web Highlights is a browser-based tool for highlighting, annotating, and organizing content from websites and PDF files. It is aimed at students, researchers, and knowledge workers, with synchronized highlights and searchable collections as its standout capabilities.
💡 Pick it for free, collaborative annotation and classroom or research discussions.
Hypothesis is a tool for annotating web pages and PDFs. It allows collaborative discussion and annotation.
💡 Pick it if you want social discovery and highlights from web pages, PDFs, and videos.
Glasp is a social knowledge-management service with tools for highlighting, annotating, and summarizing web content and YouTube videos. It serves readers, researchers,...
Freemium
Readwise
💡 Pick it if you want a full reading system with RSS, newsletters, PDFs, and highlight review.
Readwise Reader is a read-later and research application for articles, newsletters, PDFs, videos, and podcasts. It is designed for knowledge workers who...
From $9.99/mo
💡 Pick it for academic research, citation management, and a durable open-source library.
Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
💡 Pick it for mature bookmarking, tagging, and archived web research collections.
Diigo is a powerful research tool and a knowledge-sharing community.
Free / Premium plans available
💡 Pick it if you want AI-assisted search and answers over your saved web and PDF highlights.
LINER is a highlighter tool that lets you highlight text on the web and in PDFs. It offers features like organizing highlights,...
Free with premium options
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