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JSON Viewer

Browser extension that beautifully formats and displays JSON responses with syntax highlighting and collapsible trees.

Created
Stack
TypeScriptReactWXTChrome Extension
Source
pyyupsk/JSON-Viewer

A browser extension that intercepts JSON responses and renders them with syntax highlighting, collapsible trees, and search.

Features

  • Auto-detect — activates on application/json responses
  • Syntax highlighting — color-coded keys, strings, numbers, booleans
  • Collapsible trees — expand/collapse nested objects
  • Search & filter — find keys or values in large JSON payloads
  • Copy formatted — one-click copy with proper indentation
  • Works everywhere — Chrome, Firefox, Edge (via WXT)

Why

Browser-native JSON views are bare-bones. This extension adds the formatting and navigation that makes debugging API responses painless.