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Free Diff Checker

Paste two text blocks and see exactly what changed. Additions highlighted in green, deletions in red. Perfect for comparing code, config files, documents, or any text.

All comparison runs in your browser. Nothing is sent to any server.

How to Compare Two Texts

Compare two text blocks side by side and see exactly what changed using The IT Hustle's free Diff Checker.

  1. 1
    Enter original textPaste the original version of your text into the left textarea labeled 'Original'.
  2. 2
    Enter modified textPaste the modified version into the right textarea labeled 'Modified'.
  3. 3
    Click ComparePress the Compare button to generate a line-by-line diff showing additions, deletions, and unchanged lines.
  4. 4
    Review changesGreen-highlighted lines are additions, red-highlighted lines are deletions. Review the summary stats for total lines added, removed, and changed.

Frequently Asked Questions

Yes. The diff checker works with any text including source code, configuration files, markdown, CSV data, and prose. It compares line by line.

No. All comparison processing happens in your browser. Your text is never sent to any server.

Line-by-line diff marks entire lines as added or removed. Word-by-word diff highlights the specific words that changed within each line, making it easier to spot small changes in long lines.

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