JSON Formatter & Viewer — Fast, Clean, No Ads

Tracking since Apr 8, 2026.

Changelog

• Apr 26, 2026
  description

  JSON Formatter & Viewer — a lightweight tool for developers
  to format, validate and explore JSON data.
  
  ✅ Format & beautify JSON with proper indentation
  ✅ Validate JSON syntax in real-time
  ✅ Minify JSON to reduce file size
  ✅ Tree viewer with expand and collapse
  ✅ Paste from clipboard & copy back
  ✅ Load JSON from file
  ✅ Download as .json file
  ✅ Dark & light theme support
  ✅ Drag & drop support
  ✅ No ads, no tracking, no data collection
  
  Simply click the extension icon, paste your JSON, and format it instantly.
  
  Also available as a web app at https://json.fedrr.com

  JSON Formatter & Viewer — a fast, lightweight tool for developers to format, validate, explore, transform and compare JSON data. Handles JSON files up to ~10 MB.
  
  — Format & beautify —
  ✅ Format & beautify JSON with proper indentation
  ✅ Minify JSON to a single line
  ✅ Sort object keys alphabetically (recursive)
  ✅ Validate syntax in real-time with clear error messages
  ✅ Auto-format on paste or file drop
  
  — Explore —
  ✅ Interactive tree viewer with expand / collapse
  ✅ Expand to any depth level (1–8) with one click
  ✅ Search with live highlight, match count, and case-sensitive mode
  ✅ Copy any value or path from the tree
  
  — Undo & history —
  ✅ Undo the last Format, Sort Keys or Auto-format in one click
  ✅ Browse recent states and jump back to any of them (up to 30 entries, 5 MB total)
  ✅ History is remembered between sessions
  
  — Compare —
  ✅ Side-by-side JSON diff view
  ✅ Tree-based comparison with added / removed / changed filters
  ✅ Toggle unchanged keys to focus on differences
  
  — Import & export —
  ✅ Paste from clipboard or drag & drop files (up to ~10 MB)
  ✅ Load JSON from a URL
  ✅ Download as .json file
  ✅ Load a sample JSON to try it instantly
  
  — Share —
  ✅ One-click share link (data lives in the URL, never hits any server)
  
  — UX —
  ✅ Dark & light theme with preference remembered
  ✅ Editor and viewer state persisted between sessions
  ✅ No ads, no tracking, no data collection — everything runs in your browser
  
  Simply click the extension icon, paste your JSON, and format it instantly.
  
  Also available as a web app at https://json.fedrr.com

• Apr 26, 2026
  short_description

  Format, validate, beautify & minify JSON. Tree viewer, dark/light theme, load from file, drag & drop. No ads, free.

  Format, validate, minify, sort & compare JSON. Tree viewer, search, history, files up to ~10MB. No ads, no tracking, free.

• Apr 19, 2026
  permissions

  clipboardRead, clipboardWrite

  clipboardRead, clipboardWrite, storage

Permissions & access

Permissions

clipboardReadclipboardWritestorage

Host access

None declared

Screenshots