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Code Diff

Text & Code · Free Online Tool

Compare two text snippets and highlight differences.

By CoderNewbie Team
3 added2 removed
1function greet(name) {
-2 console.log("Hello, " + name);
+3 console.log(`Hello, ${name}!`);
4 return true;
5}
6
7const x = 1;
-8const y = 2;
+9const y = 3;
+10const z = x + y;

LCS Algorithm

A classic longest-common-subsequence algorithm finds the true line-level differences.

Color-Coded

Added lines glow green, removed lines glow red, unchanged lines stay neutral.

Live Summary

A running tally shows how many lines were added and removed as you edit.

How to Use Code Diff

  1. 1Enter or paste your text or code into the input area.
  2. 2Choose the desired operation (format, convert, analyze, etc.).
  3. 3Click the action button to process.
  4. 4Copy the result from the output area.

Features

  • ✓100% free — no signup, no subscription, no ads
  • ✓Runs entirely in your browser — data never leaves your device
  • ✓Fast and lightweight — instant results
  • ✓Cross-platform — works on desktop, tablet, and mobile

Frequently Asked Questions

Can I format code in different styles?

Yes, the SQL Formatter and other code tools support multiple formatting options and indentation styles.

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The Regex Tester supports case-sensitive and case-insensitive matching, along with global and multiline flags.

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