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Diff Checker

Compare two text inputs and see the differences highlighted line by line.

Paste text in both panels to see the differences.

How to use

  1. 1Paste your original text into the left panel.
  2. 2Paste the modified text into the right panel.
  3. 3Differences are highlighted automatically — added lines in green, removed lines in red.
  4. 4Use the Swap button to flip the two panels if needed, or Clear to reset both.

Why Use This Tool?

Spotting changes between two versions of a file, config, or piece of text by eye is tedious and unreliable. This tool highlights every addition and deletion line by line, making it fast to review changes, catch regressions, or verify edits — all without leaving the browser.

Frequently asked questions