Introduction

Diff Online is a free text comparison tool that shows the differences between two texts. Additions, deletions, and unchanged lines are color-coded for easy reading.

How to use:

1. Paste the original text in the left "Original Text" box.

2. Paste the modified text in the right "Modified Text" box.

3. Click "Compare" to see the differences highlighted below.

Diff Result:

About Diff Online:

Text comparison (diffing) is essential for code reviews, document editing, and configuration management. It helps you quickly spot what changed between two versions of a text.

This tool uses the jsdiff library to compute line-by-line differences. Additions are shown in green, deletions in red, and unchanged lines in white. All processing happens entirely in your browser. No data is sent to any server.