Annotate the web, with anyone, anywhere.
We’re a nonprofit on a mission to bring an open conversation over the whole web. Use Hypothesis right now to hold discussions, read socially, organize your research, and take personal notes.
or see how it works.
See how it works.
Select text to annotate.
Add tags and post publicly or save privately.
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.
Change the way you collaborate.
An open community project.
We're a mission-driven nonprofit.
Dedicated to enabling layers of conversation over the world's knowledge.
Building an open platform
That works everywhere, based on open-source technology and interoperable standards.
As a part of a global community.
Working with others across the world to advance human understanding for the public good.
about Hypothesis.