Does it compare line by line?

Yes, differences are shown at the line level with additions and deletions highlighted.

Yes, it works with any text including source code.

Text Diff / Compare Tool

Compare two texts and highlight the differences. See additions, deletions, and unchanged lines.

Also known as: text comparison tool, find differences between texts, diff checker online

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What is Text Diff / Compare Tool?

Text Diff / Compare Tool is a free, browser-based tool that lets you compare two texts and highlight the differences. See additions, deletions, and unchanged lines. No signup is required, and no files are uploaded to any server — all processing happens locally in your browser using JavaScript. This tool is also commonly referred to as text comparison tool, find differences between texts, diff checker online.

Need to count words or characters too? Use our Word Counter.

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Articles and guides related to this tool.

Text Diff Tools: A Complete Guide

Compare two texts and spot every difference. How diff tools work and when to use them.

5 min readRead Article

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