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Text Diff

Compare two texts and visually check differences. Useful for code review and document change tracking.

How to Use

  • Enter or paste your original text in the left textarea
  • Enter or paste your modified text in the right textarea
  • View differences highlighted in red (removed) and green (added)
  • Toggle between unified and split view modes
  • Use options to ignore whitespace or case differences

Key Features​

👀 Visual Comparison​

  • Added lines: Displayed in green
  • Deleted lines: Displayed in red
  • Unchanged lines: Default color

🔄 Two View Modes​

  • Unified View: Show all changes in one screen
  • Split View: Display original and modified side by side

⚙️ Comparison Options​

  • Ignore whitespace
  • Ignore case
  • Line-by-line comparison

📊 Statistics​

  • Count of added lines
  • Count of deleted lines
  • Count of unchanged lines

What is Diff?​

Diff is a tool that shows differences between two files or texts. Originally started as a Unix command, it's now a core feature of version control systems.

Diff Algorithm​

This tool uses Myers' diff algorithm to:

  1. Compare two texts line by line
  2. Find minimal changes
  3. Distinguish additions, deletions, and unchanged content

Use Cases​

1. Code Review​

Check changes in Pull Requests or commits

// Before
function calculateTotal(items) {
  let total = 0;
  for (let i = 0; i < items.length; i++) {
    total += items[i].price;
  }
  return total;
}

// After
function calculateTotal(items) {
  return items.reduce((sum, item) => sum + item.price, 0);
}

2. Document Version Comparison​

Compare two versions of a document to see what changed

3. Configuration File Comparison​

Check differences between production and development environment configuration files

4. API Response Comparison​

Compare API responses from different time points

View Modes​

Unified View​

  • Traditional diff format
  • + for added lines
  • - for deleted lines
  • Mainly used in Git, GitHub

Split View​

  • Display original and modified side by side
  • Easy to understand by viewing both simultaneously
  • Used in many GUI diff tools

Tips​

1. Ignore Whitespace​

Useful when there are only formatting changes without actual content changes.

2. Ignore Case​

Useful when you want to ignore case differences and check only substantial content changes.

3. Load Example​

Click the "Load Example" button to see sample code!

🔗 Try These Next​

💬 Was this tool helpful?​

Feel free to send us your feedback or suggestions anytime!

Privacy​

This tool operates entirely on the client side. Your text is never sent to a server and is processed only in your browser.