Is Hypothesis - Web & PDF Annotation Safe? — Extension Safety Profile
Quick verdict: Hypothesis - Web & PDF Annotation earns a safety grade B, 73.5 out of 100, based on 5 of 5 dimensions.
73.5/100
Grade B · 5 of 5 checks
What we found
Automated safety profile from public signals (the extension's manifest & permissions, store listing, publisher, privacy policy). A full review hasn't been published yet.
What this safety grade means
Hypothesis - Web & PDF Annotation earns a safety grade of B (73.5/100), measured across 5 of 5 dimensions. Its strongest area is Maintenance & Ownership (100%). The weakest is Permissions & Access (58%) — what holds its grade back the most.
On the public records we can check, Hypothesis - Web & PDF Annotation looks broadly trustworthy. 200,000 active users/installs reported on the store. Store rating 4.1/5 from 224 user ratings. Last updated on the store 2026-04-15. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open Hypothesis - Web & PDF Annotation's own store listing and privacy policy before installing, and weigh it against the other productivity extensions we track below.
Safety Signals
Based on 5 of 5 safety dimensions
| Dimension | Score | Bar | Source |
|---|---|---|---|
| Publisher & Identity | 60% · 4.8/8 pts | Automated signals | |
| Permissions & Access | 58% · 14.6/25 pts | Automated signals | |
| Data & Privacy | 85% · 13.6/16 pts | Automated signals | |
| Maintenance & Ownership | 100% · 7.5/7.5 pts | Automated signals | |
| Community Reputation | 84% · 8.4/10 pts | Automated signals |
In-depth safety analysis
The extension requests powerful permissions: it can read and change data on all websites you visit, access open tabs, and store data locally. For a tool designed to annotate any web page or PDF, this level of access is expected—it needs
AI-assisted analysis of the documented signals above (permissions, store data, privacy practices) — explains what they mean and the risks typical for this category. Not a hands-on test.
What the store listing shows
Who's Behind Hypothesis - Web & PDF Annotation?
- Publisher Annotation Unlimited PBC
Public records identify the publisher, but no individual founders or a separate registered company are named — which is what holds the Publisher & Identity score back. Less public information about who operates an extension means less you can verify about their long-term accountability.
How it compares
Among the 25 Productivity extensions we track, Hypothesis - Web & PDF Annotation scores higher on safety than 48% of them.
Computed from our own database of assessed Productivity extensions — updated as we track more.
Evidence on File (12)
Hypothesis - Web & PDF Annotation FAQ
- Is Hypothesis - Web & PDF Annotation safe?
- Hypothesis - Web & PDF Annotation earns a safety grade of B (73.5/100) on our evidence-based assessment, based on 5 of 5 safety dimensions we could verify from public records. This is an automated profile built from public records, not a hands-on review.
- Who is behind Hypothesis - Web & PDF Annotation?
- Hypothesis - Web & PDF Annotation is operated by Annotation Unlimited PBC.
Alternatives we track
Anywhere stickers - simple sticky notes A Compare Hypothesis - Web & PDF Annotation head-to-head:
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