Is JSONViewer Safe? — Extension Safety Profile
Quick verdict: JSONViewer earns a safety grade A, 88.3 out of 100, based on 5 of 5 dimensions.
88.3/100
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
JSONViewer earns a safety grade of A (88.3/100), 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, JSONViewer comes through cleanly. 10,000 active users/installs reported on the store. Store rating 4.7/5 from 15 user ratings. Last updated on the store 2026-04-22. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open JSONViewer'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 | 100% · 25/25 pts 3 of 3 checks verified | Automated signals | |
| Data & Privacy | 83% · 13.2/16 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
JSONViewer requests only the "storage" permission, which lets it save your preferences locally in the browser. It does not list any permission to access websites or page content. This minimal scope means it cannot read or alter data on the pages you visit, which is exactly what you would expect from a simple formatting tool.
For general browser extensions like developer utilities, a typical safety consideration is the presence of lookalike add-ons that request broad host permissions to inject ads or collect browsing information. Because this extension uses only storage, that risk is greatly reduced. Still, you should always install from the official store listing and verify that the permissions match the tool’s stated purpose.
The extension holds a high safety score (88.33, Grade A). Its strongest dimension is Maintenance & Ownership — it is actively maintained (last updated April2026, manifest V3). The weakest is Publisher & Identity, as the developer “opponic” has no widely established reputation. This is common for single-developer utilities and does not indicate an issue by itself, but it means there is less public accountability than with a large organisation.
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 JSONViewer?
- Publisher opponic
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, JSONViewer scores higher on safety than 91% of them.
Computed from our own database of assessed browser extensions — updated as we track more.
Evidence on File (12)
JSONViewer FAQ
- Is JSONViewer safe?
- JSONViewer earns a safety grade of A (88.3/100) 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 JSONViewer?
- JSONViewer is operated by opponic.
Browse all browser extensions we've checked →