Text Diff Checker Online Free — Compare Text & Find Differences | DevToolBox

Compare two texts side by side and instantly highlight differences. Free online diff tool for code, documents, and configuration files.

Original Text

Modified Text

About Text Diff

Text diff compares two versions of text and highlights the differences. It's essential for code review, document comparison, and tracking changes. Green lines indicate additions, red lines indicate removals.

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How to Use

Paste the original text in the left field
Paste the modified text in the right field
Click 'Compare' to see highlighted differences
Green lines are additions, red lines are deletions

Common Use Cases

Comparing code versions before committing
Reviewing configuration file changes
Finding differences between document versions
Verifying data migration accuracy

Frequently Asked Questions

What is a text diff?

A text diff compares two texts and highlights the differences — additions, deletions, and unchanged lines. It's similar to how Git shows code changes.

What diff algorithm is used?

This tool uses a line-by-line comparison algorithm that identifies added, removed, and unchanged lines between the two texts.

Can I compare code?

Yes. The diff tool works with any text including source code, configuration files, documentation, or plain text.