HypothesisCollaborative or private note taking on the web. Highlight and annotate websites in distinct notebooks. Web General and Interdisciplinary Project Research Publishing and Sharing Note-taking web.hypothesis.is Chome plug in Add tags and post publicly or save privately. Annotate the web, with anyone, anywhere. Annotate PDF Reply to or share any annotation. Link to notes or whole pages. Annotate together in groups. Collaborate privately with others. Search your notes. Explore all public annotations and profiles.