Instant JSON Viewer PRO

Fast, clean JSON viewer for developers and QA with search, tree paths, error hints, and large file support.

Instant JSON Viewer PRO helps you inspect JSON quickly and comfortably in your browser. Built for developers and QA engineers who work with API responses, logs, and JSON files every day. Key features: - Tree View and Raw View - Fast search by keys and values - Collapse all / expand all - Copy path, copy value, and copy key - Invalid JSON diagnostics with line and column hints - Dark mode - File size and node metrics - Local file open from extension popup - Drag and drop local .json files - Optimized rendering for large JSON payloads Why Instant JSON Viewer PRO: - Clean, focused UI - Fast rendering and smooth navigation - Practical tools for real debugging workflows - No telemetry in v1 Made in Ukraine. Created by Serhii Tkachenko https://serhii-tkachenko.com/