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Collaboratively annotate, highlight, and tag web pages and PDF documents. Your Digital Highlighter for the Web & PDFs Turn reading into a conversation. Whether you’re a student, researcher, or just someone who loves to read online, Hypothesis lets you take notes directly on any webpage or PDF—just like you would in the margins of a physical book. Why You’ll Love It: Highlight & Save: Never lose a great idea. Highlight key sentences and save your thoughts directly on the page. Collaborate Anywhere: Create private groups to share notes with friends, colleagues, or classmates. It’s like a book club that lives inside your browser. Works Everywhere: Use it on news articles, blog posts, scientific journals, and PDFs. Your notes stay with the document, so you can find them again instantly. Organize with Ease: Use "Tags" to categorize your research. Searching for that one specific quote across ten different websites has never been easier. Simple & Clean: No complex menus or technical jargon. If you can highlight text with your mouse, you already know how to use Hypothesis. 🚀 Coming Soon: The Future of Reading with AI We are hard at work building powerful AI-assisted features to help you learn faster and smarter. Soon, you’ll be able to: Summarize in a Click: Get instant summaries of long articles to see if they’re relevant to your research. AI Reading Assistant: Ask questions about complex paragraphs and get simplified explanations right in the sidebar. Smart Suggestions: Discover connections between your different notes and find related topics automatically. Getting Started is Easy: Add the extension to Chrome. Open any webpage or PDF. Highlight text to start your first note!
Feb 5, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.