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Text Diff Checker (Line & Word Comparison)

Find differences between two text documents side-by-side or inline with granular word-level and line-level diff highlighting.

  • 100% free
  • Files stay on your device
  • No sign-up, no watermark
+1 added-1 removed
Original Text
Modified Text
Diff Result View
function calculate(a, b) { const result = a + b; console.log("Adding:", a, b); function calculate(a, b, multiplier = 1) { const result = (a + b) * multiplier; console.log("Result:", result); return result; }

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What is Text Diff Checker (Line & Word Comparison)?

Text Diff shows exactly what changed between two versions of a document, contract, essay or code snippet. Paste the original and the revised text, then choose line, word or character comparison. Additions and deletions are highlighted so edits are easy to review. The comparison uses a standard diff algorithm and runs in your browser, which makes it safe for confidential documents.

How to use Text Diff Checker (Line & Word Comparison)

  1. 1

    Paste both versions

    Put the original text on the left and the changed text on the right.

  2. 2

    Choose diff mode

    Compare by lines for code, by words for prose, or by characters for small edits.

  3. 3

    Review the changes

    Added text is highlighted in green and removed text in red.

Frequently asked questions

Which mode should I use?

Lines for source code and lists, words for articles and contracts, characters for spotting typos.

Does whitespace count as a difference?

Yes. Extra spaces and line breaks are reported, which is useful for code but may add noise in prose.

Is my text stored?

No. Both texts stay in your browser and are cleared when you leave the page.

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