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Diff Checker

Compare text or JSON files and highlight differences.

Original Text

Modified Text

About Diff Checker

The KoolToolz Diff Checker lets you compare two pieces of text or two JSON documents and instantly see what changed. Differences are highlighted with color so you can spot additions and deletions at a glance. All processing happens locally in your browser.

Features

  • Text mode: Line-by-line diff with line numbers.
  • JSON mode: Semantic comparison that ignores key order and formatting.
  • Statistics: See the number of additions and deletions.
  • Privacy: Nothing leaves your browser.

How to Use

  • Pick the Text or JSON mode.
  • Paste the original and modified content into the two boxes.
  • Changed lines are marked in green (added) and red (removed).