Development

Difference Viewer

Free diff checker to compare code, text, or config files with syntax highlighting. Visualize changes in split or unified views.

Difference Viewer

Compare text, code, or configuration files side-by-side with syntax highlighting. Visualize changes in split or unified formats.

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Original Text

Modified Text

Differences

About Difference Viewer

Compare text, code, or configuration files side-by-side
View differences in split or unified format
Use the language selector to label your comparison context
Changes are color-coded (green for additions, red for deletions)
Useful for code reviews, tracking changes, or comparing configurations

About this tool

Instantly spot changes between different versions of your code, documents, or configurations with our diff viewer. Supports multiple programming languages with syntax highlighting and offers both split and unified viewing modes. Ideal for developers reviewing code changes, system administrators comparing config files, or content creators tracking document revisions. Just paste your content and see exactly what changed.

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Help us improve Difference Viewer!

1	// Original code	1	// Modified code
2	function hello() {	2	function hello() {
3	console.log("Hello, world!");	3	console.log("Hello, React!");
		4	console.log("Hello, Next.js!");
4	}	5	}