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 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 | 85% · 6.4/7.5 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
The extension requests only the activeTab permission, which grants temporary access to the currently open tab’s content only after the user actively invokes the extension—for example, by clicking its toolbar icon. This is exactly the scope a JSON formatter needs to detect and reformat JSON on a page. It does not receive persistent or background access to your browsing, making this a minimal and well‑scoped permission for a developer tool.
With any developer‑oriented extension that reads page content, a careful user should consider the publisher’s trustworthiness, because a malicious formatter could, in theory, exfiltrate the data it processes. The extension comes from the well‑known jsonlint.com domain, but typosquatting and copycat extensions are a general risk in this category. Verifying that you install the genuine version from the official source (the Chrome Web Store listing linked from jsonlint.com, for instance) is a good habit.
The strongest dimension in the fact sheet is Permissions & Access (100%), which confirms that the extension uses the least amount of access needed for its stated purpose and follows modern security practices. The weakest dimension is Publisher & Identity (60%), indicating that the developer’s online presence and track record are not highly documented, which may make long‑term reliability harder to evaluate. In practice, the extension’s technical risk is low, but identity considerations warrant a moment of attention before installing.
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