JSON Viewer Pro - Formatter, Beautifier & API Response Viewer

Tracking since Apr 17, 2026.

Changelog

• Apr 17, 2026
  description

  JSON Viewer Pro automatically detects and formats JSON responses in your browser.
  
  Features:
  - Collapsible tree view with syntax highlighting
  - Search across keys and values with highlighting
  - Copy individual values or full JSON paths
  - Toggle between formatted and raw JSON
  - Light, dark, and auto themes (follows your system preference)
  - URL detection — clickable links in string values
  - File size display in the toolbar
  
  Why JSON Viewer Pro?
  - Zero tracking or analytics — your data stays on your device
  - No ads, donation popups, or injected content
  - Fast and lightweight
  - Clean, modern UI with dark mode support
  - Open source

  JSON Viewer Pro automatically detects and formats JSON responses in your browser.
  A fast, lightweight alternative to JSON Formatter with zero tracking.
  
  FEATURES
  - Collapsible tree view with syntax highlighting
  - Search across keys and values with real-time highlighting
  - Copy individual values or full JSON paths (JSONPath style)
  - Toggle between formatted tree view and raw JSON
  - Light, dark, and auto themes (follows your system preference)
  - URL detection — clickable links in string values
  - File size display in the toolbar
  
  WHY JSON VIEWER PRO?
  - Zero tracking or analytics — your data stays on your device
  - No ads, donation popups, or injected content of any kind
  - No checkout hijacking or third-party scripts
  - Fast and lightweight — minimal permissions (storage only)
  - Clean, modern UI with dark mode support
  - 100% open source — inspect every line of code on GitHub
  - Built with Manifest V3 for maximum security
  
  PRIVACY FIRST
  Other JSON extensions have been caught injecting donation popups into
  checkout pages, tracking user locations via GeoIP, and sending browsing
  data to third-party servers. JSON Viewer Pro takes the opposite approach:
  we collect nothing, track nothing, and inject nothing beyond formatting
  your JSON.
  
  PERFECT FOR
  - API development and debugging
  - REST API response inspection
  - JSON configuration file viewing
  - Webhook payload debugging
  - Any page that returns application/json
  
  PERMISSIONS
  - Storage: saves your theme preference (light/dark/auto) only
  - Host permissions: needed to detect JSON content type on any URL
    (exits immediately on non-JSON pages — no data collected)

• Apr 17, 2026
  short_description

  Clean, fast JSON viewer with tree view, search, and syntax highlighting. No ads, no tracking, no popups.

  Fast, private JSON viewer with tree view, search, and syntax highlighting. No tracking, no ads, no popups. Open source.

• Apr 17, 2026
  name

  JSON Viewer Pro

  JSON Viewer Pro - Formatter, Beautifier & API Response Viewer

Permissions & access

Permissions

storage

Host access

None declared

Screenshots

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