JSON Surgeon — Format, Diff, Convert & Query JSON

The power-user JSON tool. Auto-format in tabs, diff side-by-side, convert to YAML/TypeScript/CSV, query with JSONPath. Free + Pro.

As of June 2026, JSON Surgeon — Format, Diff, Convert & Query JSON has — users in the Developer Tools category.

Developer Tools

Chrome Web Store ↗.crx

Users0%

—

Rating0%

—

— reviews

Reviews0%

—

Version

1.0.0

Manifest V3

Permissions & access

Permissions: activeTabstoragecontextMenusclipboardWrite
Host access: None declared

Screenshots

JSON Surgeon — Format, Diff, Convert & Query JSON screenshot 1

JSON Surgeon — Format, Diff, Convert & Query JSON screenshot 2

JSON Surgeon — Format, Diff, Convert & Query JSON screenshot 3

About

JSON Surgeon is the power-user JSON toolkit built for developers. Works automatically on any JSON URL - no copy-pasting required.

  ─── FREE FEATURES ───────────────────────

  ✦ Auto-format JSON browser tabs - visit any JSON URL and it's instantly rendered as a beautiful, interactive tree
  ✦ Collapsible tree view with syntax highlighting
  ✦ Copy any value or key path with one click
  ✦ Minify & format JSON in the popup
  ✦ Dark / light / system theme
  ✦ Right-click → Format selected JSON on any page

  ─── PRO FEATURES ($2.99/mo or $9.99/yr) ─

  ✦ Side-by-side JSON Diff - spot exactly what changed
  ✦ TypeScript Interface Generator - paste JSON, get types instantly
  ✦ Format Converter - convert JSON ↔ YAML, TOML, CSV
  ✦ JSONPath Query Builder - filter and extract with live results
  ✦ JSON Schema Validator - validate against any schema
  ✦ Persistent Scratchpad - multi-tab workspace that survives browser restarts

  ─── PRIVACY ─────────────────────────────

  All processing happens locally in your browser. Your JSON never leaves your machine. No tracking. No ads.

  ─── PERFECT FOR ─────────────────────────

  • API developers inspecting responses
  • Frontend engineers debugging payloads
  • DevOps / backend engineers reviewing configs
  • Anyone who works with JSON daily

  Built by a principal software engineer. Actively maintained.