Annotate!

with anyone, anywhere, anytime

Hypothesis is a tool for for inline annotation and discussion of web content. With Hypothesis you can:

• Turn any web page or PDF into an interactive workspace
• Create, discuss, and share annotations
• Make private notes
• Consolidate your annotations and discussions into a single service that works across platforms and formats

Getting started with Hypothesis is easy and free! Simply install our browser extension, sign up for an account and start annotating.

or...

You can incorporate Hypothesis directly in your website or portal so no extensions are required. All our software is open source and free to use.

Everything we build is guided by our principles, among them to be be free, open, non-profit, neutral, and durable. We are a non-profit organization, funded through the generosity of the Knight, Mellon, Shuttleworth, Sloan and Helmsley Foundations– and through the support of hundreds of individuals like yourself that want to see this idea come to fruition.