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).
对比了其他所有类似插件,这个是最好的!(liner太贵了) 很不错的插件! 一个建议:如果可以对一个网页默认启用划线就好了,否则需要每次点击一下才会开启(最好是可以设置是否默认启用)
Not working with local pdfs: "We’re sorry, Hypothesis couldn’t open that file… This extension can’t be used on local HTML documents at the moment." File url access allowed Version 88.0.4324.182 (Official Build) (64-bit), Ubuntu 20.04.02
Just installed this after trying a bunch of other web highlighters, and it's far and away the best one. The other extensions I tried are all half-baked: Instapaper and Pocket (garbage) don't let you highlight portions of the article inline. Liner does a better job with on-page highlighting, but has no API and so doesn't integrate with anything. Only Hypothes.is actually has seamless in-page highlighting and a legit API. Moreover it integrates with apps like Readwise, which is huge. Ironically it's the only one of the bunch that's free, though I'd gladly pay for it over the others. My only minor beefs are that I have to click the icon in my toolbar to show the highlights and that the highlight count indicator doesn't distinguish between my private highlights and the public highlights of others. But overall great tool.
it's best annoation tools for chrome...
Exactly what I want !!!
Não dá pra desenhar. :(
Why I can not export my notes !!!???
The annotation button and highlight button are nowhere to be found. It doesn't appear when you highlight a text. So I can only make notes on pages -_-
It works really well, the features where you can click on an annotation and the page moves to where it is, is nice. I wish the color for highlights and annotations were different, though.
As a high school English teacher I have been so impressed with the usability of this extension. It is perfect for finding texts online to annotate, discuss, and share more information/research more about them. Really thankful that I found it.