Text Diff Checker

Compare two texts and see the differences highlighted. Perfect for code reviews and document comparison.

Original Text

Modified Text

Enter text in both panels to compare differences

How to Use Diff Checker

Paste the original text in the left panel
Paste the modified text in the right panel
Differences are calculated automatically
View the statistics showing added, removed, and unchanged lines
Use the diff table to see line-by-line changes
Use Swap Texts to reverse the comparison

Understanding the Diff Output

Added Lines (Green) - Lines that exist in the modified text but not in the original
Removed Lines (Red) - Lines that exist in the original text but not in the modified
Unchanged Lines - Lines that are identical in both texts

Common Use Cases

Code review comparisons
Document version comparison
Configuration file changes
Content editing review
Comparing API responses
Tracking text changes over time

How It Works

This diff checker uses the Longest Common Subsequence (LCS) algorithm to identify the differences between two texts. It compares texts line by line and highlights additions, deletions, and unchanged content.

Features

Real-time diff calculation
Line-by-line comparison with line numbers
Statistics showing added, removed, and unchanged lines
Swap functionality to reverse comparison
Clear highlighting for easy visualization
Works entirely in your browser - no data is sent to any server

Tips

Ensure consistent line endings for accurate comparison
Use the swap button to quickly reverse the comparison direction
Check the statistics to get a quick overview of changes
Line numbers help locate changes in larger documents