What algorithm is used for diffing?

We use a client-side implementation of the Longest Common Subsequence (LCS) algorithm to find line and character differences.

What does the red highlight mean?

Red highlights represent deleted text or lines present in the original version but removed in the modified version.

What does the green highlight mean?

Green highlights represent newly added text or lines introduced in the modified version.

Does this support side-by-side split view?

Yes, you can toggle between split view (two columns) and unified view (single inline column).

Is my compared text sent to a server?

No. The entire comparison logic is computed 100% locally inside your browser, ensuring absolute security.

Can I compare programming source code?

Yes. It is ideal for comparing code snippets, JSON files, configuration files, and HTML blocks.

Are spaces and line breaks checked?

Yes. By default, the checker is sensitive to spacing, tab differences, and line endings, highlighting them clearly.

Can I export the diff comparison report?

You can capture screenshots or copy the highlighted text. The layout is optimized for clear presentation.

How does unified view display changes?

Unified view shows all lines in a single list, placing deleted lines directly above added lines for quick verification.

Is there a size limit for comparisons?

It handles large files of several thousand lines easily. Extremely large files may cause minor delays depending on processor speed.

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Comparison Tool

Text Diff Checker

Paste two versions of text and instantly see what changed. Added lines in green, removed in red.

Ignore Case Ignore Whitespace Show Unchanged Lines

Original Text

Modified Text

Lines Added

Lines Removed

Unchanged

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Similarity

Diff Result

Added Removed Unchanged

Paste text in both boxes above to see the differences...

Text Diff Checker

Diff Result

What is Text Diff Checker and How to Use It?

How to Use

Frequently Asked Questions

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Text Diff Checker

Diff Result

What is Text Diff Checker and How to Use It?

How to Use

Frequently Asked Questions

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