Is MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export Safe? — Extension Safety Profile
Quick verdict: MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export earns a safety grade B, 79.4 out of 100, based on 5 of 5 dimensions.
79.4/100
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
MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export earns a safety grade of B (79.4/100), 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, MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export looks broadly trustworthy. 20,000 active users/installs reported on the store. Store rating 5.0/5 from 89 user ratings. Last updated on the store 2026-09-28. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export'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 | 65% · 16.2/25 pts 3 of 3 checks verified | Automated signals | |
| Data & Privacy | 100% · 16/16 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 | 83% · 8.3/10 pts 2 of 4 checks verified | Automated signals |
In-depth safety analysis
The extension requests “storage” to save preferences, “activeTab” to interact with the current page, and “downloads” for exporting files. It also asks for host access to all websites (*://*/*) and local files (file:///*), which means it can read and modify content on any site you visit and any local document you open. For a markdown viewer that needs to process files from arbitrary locations, this broad scope is fairly typical, but it does grant significant control over your browsing activity.
In the general browser extension category, any tool with host-wide access warrants a cautious approach. While this add‑on has a perfect user rating (5/5 from 89 ratings) and the developer states data is not sold, a careful user should remember that such permission could theoretically be used to inject or observe page content. Stick to trusted sources and watch for any unusual behavior after installation, as you would with any extension that can see all your pages.
The safety fact sheet highlights a weaker “Publisher & Identity” score (60%), suggesting limited transparency or verification of the developer behind the extension. By contrast, “Maintenance & Ownership” scores a perfect100%, supported by a recent update(September2026). This active maintenance is reassuring, but it means trust must rely more on the extension’s track record than on a clearly verified publisher.
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 MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export?
- Publisher https://getmarkview.com/
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, MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export scores higher on safety than 61% of them.
Computed from our own database of assessed browser extensions — updated as we track more.
Evidence on File (12)
MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export FAQ
- Is MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export safe?
- MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export earns a safety grade of B (79.4/100) 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 MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export?
- MarkView: Markdown Viewer with Mermaid Diagrams, Math & Export is operated by https://getmarkview.com/.
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