Is Hypothesis - Web & PDF Annotation safe?

Low risk

This extension lets you annotate webpages, PDFs, and EPUBs for notes, research, and discussion.

It supports social reading, discussions, research organization, and personal notes on webpages, PDFs, and EPUBs. The provided permissions list does not specify site access or named data recipients.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

Hypothesisv1.1729.0.0Chrome Web Store
20Risk
Who publishes it

Annotation Unlimited PBC - no other listings under this identity

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Hypothesis
Declared legal entity
Annotation Unlimited PBC
Registered address
548 Market St #32444, San Francisco, CA 94104-5401, US
Registered contact
Dan Whaley

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 1.1729.0.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on every site you visit

    <all_urls>

  • Run its own code inside the pages you visit

    scripting

  • Store data in your browser

    storage

  • See the address and title of every tab you have open

    tabs

Updated 30 September 2026bjfhmglciegochdpefhhlphglcehbmek