Code Comparison

Git DiffViewer

Compare code changes with syntax highlighting and side-by-side views.

Side-by-Side

Compare changes with split view

Syntax Highlight

Beautiful code highlighting

Easy to Read

Clear visualization of changes

Compare Code Changes

Paste your code to see the differences

Original Code

Modified Code

Original

1function calculateTotal(items) {
2  let total = 0;
3  for (let i = 0; i < items.length; i++) {
4    total = total + items[i].price;
5  }
6  return total;
7}

Modified

1function calculateTotal(items) {
2  return items.reduce((total, item) => {
3    return total + item.price;
4  }, 0);
5}

Lines Removed

Lines Added

Net Change

71%

Change Ratio

Code Examples

Common Refactoring Patterns

See how code improvements look in diff view

Refactored Function

Before

function getUserData(id) {
  const user = database.query('SELECT * FROM users WHERE id = ' + id);
  return user;
}

After

async function getUserData(id) {
  const user = await database.query('SELECT * FROM users WHERE id = ?', [id]);
  return user;
}

Modern Syntax

Before

var items = [1, 2, 3];
var doubled = [];
for (var i = 0; i < items.length; i++) {
  doubled.push(items[i] * 2);
}

After

const items = [1, 2, 3];
const doubled = items.map(item => item * 2);

Git Commands

Diff Commands Reference

Essential commands for viewing differences

Show unstaged changes

$ git diff

Show staged changes

$ git diff --staged

Show all changes (staged + unstaged)

$ git diff HEAD

Compare two branches

$ git diff branch1..branch2

Compare two commits

$ git diff commit1 commit2

Show summary of changes

$ git diff --stat