Diff Checker
Compare two text files side-by-side or inline to detect precise code edits, line additions, and deletions.
100% Client-Side (No data leaves your device)
Original Text (Left)
Modified Text (Right)
User Guide: Visual Differences (Diff)
How the Diff Checker Works
This checker uses a line-level Longest Common Subsequence (LCS) algorithm to analyze text changes entirely inside your browser memory. It highlights changes as follows:
- Deletions (Red background): Lines present in the original text but removed or replaced in the modified version.
- Additions (Green background): New lines inserted in the modified text.
View Options
- Side-by-Side: Shows the original and modified contents in a paired dual-column spreadsheet layout, allowing direct horizontal alignment.
- Inline (Unified): Integrates additions and deletions chronologically in a single running text block, similar to Git commit patches.