AI product readCollaborative web and PDF annotation tool that allows users to highlight, annotate, and tag web pages, PDF documents, and EPUBs
Enables collaborative reading, research organization, and discussion by allowing users to add annotations, highlights, tags, and comments directly on web content and documents
User installs extension, browses web pages or opens PDFs, selects text to highlight or annotate, writes comments/tags, and shares annotations with collaborators through Hypothesis groups. The extension injects a sidebar into web pages and provides a built-in PDF viewer. Annotations are stored on the Hypothesis service (hypothes.is) and synced across devices.
Highlight text on web pages, PDFs, and EPUBsCreate annotations with comments on any web contentTag and organize annotationsCollaborative annotation in shared groupsSupport for PDF viewing with built-in PDF.js viewerSidebar interface for browsing and managing annotations
- Target users
- Researchers / Students / Academics / Journalists / Knowledge workers / Anyone needing collaborative reading and annotation
- Source files are heavily minified (annotator.bundle.js, sidebar.bundle.js), making deeper code analysis difficult
- Could not inspect the actual Hypothesis API to determine if free tier has usage limits or feature restrictions
- The extension's profile.html and notebook.html are minimal HTML shells loading from the same bundle, limiting visibility into specific UI flows
MonetizationNo paid features detected
No evidence of paid feature gating, billing APIs, subscription logic, upgrade prompts, or premium feature checks in the extension source code. The 'premium' keyword match found in ui-playground.bundle.js line 276 is in unrelated sample text about California rolls (sushi description). No Stripe, payment, or billing integrations detected. The Hypothesis service (hypothes.is) offers organizational/enterprise plans externally, but the extension itself does not gate any features behind payment.
- Confidence
- 80
- Payment platform
- --
- Source
- AI / Medium
- Login required
- Yes
- Reason
- The extension uses OAuth to authenticate with the Hypothesis service (hypothes.is). The sidebar code has an `isLoggedIn` selector checking `profile.userid !== null` (sidebar.bundle.js line 109), and the UI shows a 'Log in' button for unauthorized users when accessing content (sidebar.bundle.js line 134). Creating annotations requires an authenticated user account on hypothes.is. The extension itself does not implement its own account system — it delegates authentication to the Hypothesis destination service via OAuth (oauthClientId configured in app.html line 10 and extension.bundle.js line 180).
Can't do multiple annotations???
Amazing, but please add an option for BRIGHTER, CONTRASTING highlighting! I have a fairly high brightness monitor, and I can barely see the yellow highlighting.I literally highlight the same spot multiple times to see it better!
Exactly what I looked for and even better. It is interesting to see that someone already read the article and had some thoughts
Promising but with some major holes. Once you've annotated a file, there is no where to save it (no dashboard or list of files you've worked on). The help doc on printing didn't work. The overlay doesn't show up when you go to print. So take all the notes and they are stuck on your screen. Also, there is so little for help documentation. Not helpful as a research tool yet. Could be really cool. Just missing some key pieces.
Exactly what i was looking for. Pat on the back!
Warning. You need to create an account before you can do anything. That is just crazy, why do i need to signup when I just want to create labels to my pdf files??
Very promising. Waiting on functionality like local storage of posts, group post management, bar location options, and more.
Very handy app. Request: a dashboard overview of all notes made.
Love this site/plugin - collaborative commenting without limiting fee structures. If I had one request though, it would be an option to have the plugin automatically activate for pdfs.
I will rereview at another time but it looks really promising!