Is ZetaMarker - PDF & Web Highlighter Safe? — Extension Safety Profile
Quick verdict: ZetaMarker - PDF & Web Highlighter earns a safety grade A, 85.7 out of 100, based on 5 of 5 dimensions.
85.7/100
Grade A · 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
ZetaMarker - PDF & Web Highlighter earns a safety grade of A (85.7/100), measured across 5 of 5 dimensions. Its strongest area is Maintenance & Ownership (100%). The weakest is Publisher & Identity (60%) — what holds its grade back the most.
On the public records we can check, ZetaMarker - PDF & Web Highlighter comes through cleanly. 20,000 active users/installs reported on the store. Store rating 4.3/5 from 124 user ratings. Last updated on the store 2026-07-31. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open ZetaMarker - PDF & Web Highlighter's own store listing and privacy policy before installing, and weigh it against the other browser extensions we track below.
Safety Signals
Based on 5 of 5 safety dimensions
| Dimension | Score | Bar | Source |
|---|---|---|---|
| Publisher & Identity | 60% · 4.8/8 pts 2 of 5 checks verified | Automated signals | |
| Permissions & Access | 90% · 22.5/25 pts 3 of 3 checks verified | Automated signals | |
| Data & Privacy | 93% · 14.8/16 pts 4 of 5 checks verified | Automated signals | |
| Maintenance & Ownership | 100% · 7.5/7.5 pts 1 of 2 checks verified | Automated signals | |
| Community Reputation | 74% · 7.4/10 pts 2 of 4 checks verified | Automated signals |
In-depth safety analysis
ZetaMarker requests permissions typical of a browser highlighter: storage saves your highlights locally, activeTab lets it access the page you are currently on only when you click the extension, scripting injects the highlighting functionality, identity may enable account sync, and alarms allows scheduling. Because it uses activeTab rather than broad host permissions, its page access is limited to sites where you actively use it — a privacy-conscious design that fits the category well.
For any extension that can read and modify website content, a careful user should be aware that it has the technical ability to see the text and structure of pages where it is active. When choosing a highlighter, it is wise to prefer those from trustworthy sources with clear privacy practices and a history of maintenance. This developer declares they collect personally identifiable information and website content, but also that data is not sold or used for unrelated purposes.
This extension received a high overall safety score of 85.7 (Grade A). Its strongest dimension was Maintenance & Ownership, indicating it is actively and reliably updated. The weakest dimension was Publisher & Identity, which suggests less publicly verified information about the company behind it — something a cautious user might consider when granting access to page content.
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 ZetaMarker - PDF & Web Highlighter?
- Publisher ZetaMarker Ltd.
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 838 browser extensions we track, ZetaMarker - PDF & Web Highlighter scores higher on safety than 86% of them.
Computed from our own database of assessed browser extensions — updated as we track more.
Evidence on File (12)
ZetaMarker - PDF & Web Highlighter FAQ
- Is ZetaMarker - PDF & Web Highlighter safe?
- ZetaMarker - PDF & Web Highlighter earns a safety grade of A (85.7/100) 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 ZetaMarker - PDF & Web Highlighter?
- ZetaMarker - PDF & Web Highlighter is operated by ZetaMarker Ltd..
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