Is JSON Formatter Safe? — Extension Safety Profile
Quick verdict: JSON Formatter earns a safety grade A, 85.4 out of 100, based on 5 of 5 dimensions.
85.4/100
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
JSON Formatter earns a safety grade of A (85.4/100), measured across 5 of 5 dimensions. Its strongest area is Permissions & Access (100%). The weakest is Publisher & Identity (60%) — what holds its grade back the most.
On the public records we can check, JSON Formatter comes through cleanly. 10,000 active users/installs reported on the store. Store rating 4.0/5 from 8 user ratings. Last updated on the store 2026-01-07. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open JSON Formatter's own store listing and privacy policy before installing, and weigh it against the other developer tools 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 | 100% · 25/25 pts | Automated signals | |
| Data & Privacy | 83% · 13.2/16 pts | Automated signals | |
| Maintenance & Ownership | 85% · 6.4/7.5 pts | Automated signals | |
| Community Reputation | 74% · 7.4/10 pts | Automated signals |
In-depth safety analysis
This extension requests only the activeTab permission, which allows it to read and modify the content of the current tab only when you click the extension icon or invoke it manually. That is exactly what a JSON formatter needs: it must access raw page text to detect and reformat JSON data. The permission does not grant ongoing background access to all tabs, so its scope is appropriately limited for the category.
General browser extensions that format data can be safe when they keep permissions minimal, but users should still be aware that any extension with page access could theoretically capture visible content while active. With this tool, that access is temporary and user-initiated, which reduces exposure. The privacy
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 JSON Formatter?
- Publisher jsonlint.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 17 Developer Tools extensions we track, JSON Formatter scores higher on safety than 94% of them.
Computed from our own database of assessed Developer Tools extensions — updated as we track more.
Evidence on File (12)
JSON Formatter FAQ
- Is JSON Formatter safe?
- JSON Formatter earns a safety grade of A (85.4/100) 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 JSON Formatter?
- JSON Formatter is operated by jsonlint.com.
Alternatives we track
Browse all browser extensions we've checked → · Best Developer Tools extensions