Who Develops JSON Editor Online?

JSON Editor Online is developed and maintained by Jos de Jong, a senior software engineer with more than 20 years of experience. The site describes him as an enthusiastic, passionate engineer, and he created the editor out of his own daily need to work with JSON-based APIs and databases as a full-stack engineer.

What the Site Says About the Developer

The tool's About section is the primary source for this information. It presents Jos de Jong as the sole named developer and maintainer, and frames the project's origin as a personal solution to a recurring work problem rather than a commercial product launch.

Why the Background Matters for Users

The developer's background is relevant if you are deciding whether to trust the tool with your data or to rely on it in a workflow.

• Domain fit: The editor was built by someone who used JSON APIs and databases daily as a full-stack engineer, which aligns with the tool's feature set — editing, formatting, comparing, querying, transforming, and validating JSON.
• Longevity signal: The site notes the tool is "the original and most copied JSON Editor on the web" and reports steady growth in usage over the past year. The current version listed is 7.15.1.
• Active maintenance: Recent updates include "Expand All" and "Collapse All" buttons in text mode (2025-09-24) and preserving undo/redo history when switching between text, tree, and table modes (2024-11-27). These are concrete signs of ongoing development rather than an abandoned project.

Practical Takeaway

If your question is simply "who makes this tool," the answer is one named engineer with two decades of experience, building it from his own JSON workflow needs. For a fuller trust assessment, pair that with the site's own data policy and FAQ pages, and check the pricing page if you need to know which features sit behind a subscription — the site links to a Pricing page but does not state terms in the material summarized here.