The developer tools you reach for every day, all in one place.

Converters, formatters, hashes, validators, and the small utilities you keep reopening stay together instead of getting lost across tabs.

GitHub

/ Tools

■

/ Tool Finder

109 tools

/ Text Comparer

Original Text

Modified Text

Diff Mode

/ Selected Tool

Text Comparer

Compare two texts and highlight differences

■ 01

What is text comparison?

Text comparison (or diff) is a tool that identifies and highlights changes between two pieces of text. It shows what was added, removed, or kept the same, making it easy to spot differences between documents, code versi…

■ 02

How does it work?

This tool uses the Longest Common Subsequence (LCS) algorithm to compute differences between two texts. It highlights additions in green and deletions in red with strikethrough, providing a visual representation of chan…

■ 03

Sample Case

Covers Common Use Cases so you can compare common inputs and outputs quickly.

/ Code

■

/ Integration

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

/ Source Code

TypeScript

typescript

type DiffPart = {
  value: string;
  type: 'added' | 'removed' | 'unchanged';
};

// Compute word-level diff using Longest Common Subsequence (LCS)
function computeWordDiff(str1: string, str2: string): DiffPart[] {
  const words1 = str1.split(/(\s+)/);
  const words2 = str2.split(/(\s+)/);