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  1. Home
  3. Text Tools
  5. Diff Checker

Diff Checker

Compare two texts and see the differences

Related Tools

  • Prompt Diff - compare AI prompts specifically
  • Regex Tester - find patterns in text
  • Line Sorter - sort and deduplicate lines
  • Word Counter - analyze text statistics
  • Remove Duplicates - clean text
  • AI Text Cleaner - clean formatting

How to Use Text Diff Checker

  1. 1

    Enter original text

    Paste your original text in the left input field.

  2. 2

    Enter modified text

    Paste your modified or comparison text in the right input field.

  3. 3

    View differences

    See additions, deletions, and modifications highlighted in the diff output.

Frequently Asked Questions

Yes, the Diff Checker is completely free with no limitations. Compare as many texts as you need without registration or usage restrictions.

Yes, all text comparison happens locally in your browser using JavaScript. Your texts are never uploaded to any server. This is especially important when comparing sensitive documents, code with proprietary logic, or confidential information.

You can compare any plain text including code in any programming language, configuration files, markdown documents, CSV data, or general prose. The tool performs line-by-line comparison and highlights additions, deletions, and unchanged lines with clear visual indicators.

The ignore whitespace option treats lines as equal if they differ only in spaces, tabs, or indentation. This is useful when comparing code that may have different formatting but is functionally identical. Similarly, ignore case treats uppercase and lowercase letters as equal.

Yes, use the Copy Diff button to copy the comparison results in a standard unified diff format with + for additions, - for removals, and spaces for unchanged lines. This format is widely recognized and can be shared or used with other diff tools.