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formatmyjson.app
JSON Formatter

Universal Text Diff & Compare Tool

Compare any text, code, JSON, CSV, config files, or prose side-by-side. Supports character-level diff with additions (green), removals (red), and unchanged lines. Switch between side-by-side and unified diff views. Works entirely in your browser — no data is sent to any server.

Features:

  • Side-by-side comparison
  • Unified diff format
  • Line-level highlighting
  • Swap & clear buttons

Supports:

  • JSON & source code
  • Plain text & prose
  • CSV & config files
  • Any text format