Developer Callum Locke is transitioning the popular JSON Formatter Chrome extension from an open-source project to a closed-source, commercial model. This change aims to fund a more comprehensive API-browsing tool featuring premium capabilities. While the original repository remains online for reference, the developer is pivoting away from the free, community-driven version to build a specialized product.

Users seeking the original experience can now access JSON Formatter Classic, a final open-source release that provides local-only formatting without further updates. This version maintains essential features like syntax highlighting, dark mode, and collapsible trees. It ensures that developers who prefer lightweight, transparent tools can still inspect API responses with minimal performance impact.

Technical limitations regarding large numbers persist due to how V8 handles the JSON.parse method. Specifically, values exceeding Number.MAX_SAFE_INTEGER undergo adjustment because of native JavaScript constraints. Locke suggests that APIs requiring extreme precision should quote such numbers as strings to avoid these rounding errors during browser-based inspection.