Online Diff Checker
Paste two texts and instantly see what changed. Color-coded line diff highlights additions in green and removals in red.
Line-by-Line Diff
Color-Coded Output
No Data Stored
Original Text (A)
Modified Text (B)
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How the Diff Checker Works
Our online diff checker uses the Longest Common Subsequence (LCS) algorithm â the same core algorithm used by industry-standard tools like Git, GitHub, and diff command-line utilities. It analyzes two texts line by line and produces a precise, color-coded difference report.
Common Use Cases
- Code Review: Compare two versions of source code before and after a refactor.
- Document Comparison: Find changes between contract drafts, essays, or reports.
- Configuration Files: Spot differences between server config files.
- Content Editing: Track edits made to blog posts, articles, or translated text.
- Data Validation: Verify that two outputs from different systems match.
Reading the Results
Lines highlighted in green (+) appear only in Text B (added). Lines in red (â) appear only in Text A (removed). Unchanged lines are shown in white for context.