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How to Use

  1. 1

    Paste Your Texts

    Enter or paste the first text in the "Text 1" field and the second text in the "Text 2" field. You can also load a quick example to see how the tool works.

  2. 2

    Configure Comparison Options

    Select your preferred diff mode (line, word, or character), choose between side-by-side or unified view, and enable ignore case or ignore whitespace options if needed.

  3. 3

    Generate the Diff

    Click the "Generate Diff" button to compare the texts. The tool uses an advanced LCS algorithm to accurately detect all changes between the two texts.

  4. 4

    Review Color-Coded Results

    Review the diff result with green highlighting for additions, red for deletions, and normal background for unchanged content. Use the statistics to see the number of changes at a glance.

  5. 5

    Export or Copy Results

    Copy the diff result to your clipboard or download it as a text file for documentation, sharing, or further analysis.

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Frequently Asked Questions

What types of text can I compare with this diff tool?
You can compare any type of text including source code (JavaScript, Python, Java, etc.), documents, articles, configuration files (JSON, YAML, XML), logs, scripts, CSV data, and plain text. The tool supports up to 500,000 characters per text input.
How accurate is the text comparison algorithm?
Our tool uses an advanced LCS (Longest Common Subsequence) based diff algorithm, the same technology used by version control systems like Git. It provides highly accurate line-by-line, word-level, and character-level comparisons with proper detection of moved, added, and removed content.
Can I export the diff comparison results?
Yes, you can export results in two ways: copy the diff to your clipboard for pasting elsewhere, or download it as a plain text (.txt) file with standard diff notation (+ for additions, - for deletions). The export preserves all formatting and change indicators.
What is the difference between side-by-side and unified view?
Side-by-side view displays the original text on the left and modified text on the right in two columns, making it easy to see changes at a glance. Unified view shows all changes in a single column with + and - indicators, similar to Git diffs. Side-by-side is better for visual comparison, while unified is more compact and mobile-friendly.
How do the ignore case and ignore whitespace options work?
Ignore case treats uppercase and lowercase letters as identical (e.g., "Hello" = "hello"). Ignore whitespace removes all extra spaces, tabs, and line breaks before comparison, focusing on content rather than formatting. These options are useful when comparing code that may have different formatting or capitalization conventions.
Is my text data safe and private?
Yes, absolutely. All text comparison happens entirely in your browser using client-side JavaScript. Your text is never sent to our servers or stored anywhere. The tool works completely offline once loaded, ensuring complete privacy and security of your sensitive data.
What is the maximum text size I can compare?
Each text input can contain up to 500,000 characters (approximately 500KB). This limit ensures smooth performance without freezing your browser. For larger files, consider splitting them into smaller sections or using command-line diff tools.
Can I use this for code review?
Yes! This tool is perfect for code review. Use line-by-line mode to compare code versions, review pull request changes, or track modifications. The color-coded highlighting makes it easy to spot added, removed, or modified code. Many developers use it alongside Git for quick visual comparisons.