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/ Diff Viewer

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Diff Viewer

Compare two texts side by side with line-by-line or word-by-word diff

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What is a Diff Viewer?

A diff viewer is a tool that compares two pieces of text and highlights the differences between them. It shows what was added, removed, or changed, making it easy to review modifications in documents, code, or any text…

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How does it work?

This tool uses the Longest Common Subsequence (LCS) algorithm to compute differences between two texts. Additions are highlighted in green with a + prefix, and deletions are shown in red with a - prefix. Diff Modes Line…

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Sample Cases

Covers Code review, Document comparison, and Configuration files so you can compare common inputs and outputs quickly.

/ Code

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/ Integration

Source code from the selected tool, shown here alongside the live version on the right.

/ Source Code

TypeScript

typescript

// Line-by-line diff using Longest Common Subsequence (LCS)
// No external dependencies required

interface DiffLine {
  lineNumber1: number | null;
  lineNumber2: number | null;
  content: string;
  type: 'added' | 'removed' | 'unchanged';
}