Best In-Browser JSON Viewers and How to Build One
The best in-browser JSON viewers: Chrome extensions, Firefox add-ons, and how to build a simple JSON viewer with syntax highlighting in vanilla JS.
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Tags: json, developer-tools, browser
Best In-Browser JSON Viewers and How to Build One Chrome's native JSON viewer is barebones — it applies monospace font and basic syntax highlighting, but provides no collapsible tree, no search, and no copy-by-path functionality. If you open a JSON URL in Chrome without an extension installed, you get raw formatted text with no navigation capability. For small payloads that is fine. For a response with fifty nested levels and thousands of keys, it is not. This article covers what the native viewer gives you versus what extensions add, and walks through building a minimal but functional JSON viewer in under 80 lines of JavaScript. Chrome's Native JSON Viewer: Limitations Chrome 128+ improved the built-in JSON viewer: it reformats the JSON with consistent indentation and syntax-colors keys,…
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