Is JSON Formatter Safe? — Extension Safety Profile

JSON Formatter requests “” host permissions, which allows it to read and modify data on any website you visit. Together with storage and unlimitedStorage permissions, it can save settings or cached data locally. For a developer tool that detects and reformats JSON content on pages, broad access is expected so it can work anywhere. Still, this means the extension can technically see everything you do in your browser, including sensitive information.

Developer tools commonly need extensive permissions to inspect and transform page content. A careful user should only install such tools from a publisher they trust, as any extension with all-urls access could potentially collect private data like login credentials or browsing history if it were malicious or compromised. Reviewing the privacy policy and checking for a solid community track record helps mitigate that risk.

The extension’s Maintenance & Ownership dimension scores best, suggesting active updates and a stable codebase. The weakest dimension is Publisher & Identity, which may indicate less publicly available information or a shorter store presence. While the developer declares that data is not sold or used for unrelated purposes, users balancing this self-declaration against the lower publisher identity score should ensure the tool comes from the expected source and monitor for any unusual behavior.