What types of text can I compare with this diff tool?

You can compare any type of text including source code (JavaScript, Python, Java, etc.), documents, articles, configuration files (JSON, YAML, XML), logs, scripts, CSV data, and plain text. The tool supports up to 500,000 characters per text input.

How accurate is the text comparison algorithm?

Our tool uses an advanced LCS (Longest Common Subsequence) based diff algorithm, the same technology used by version control systems like Git. It provides highly accurate line-by-line, word-level, and character-level comparisons with proper detection of moved, added, and removed content.

Can I export the diff comparison results?

Yes, you can export results in two ways: copy the diff to your clipboard for pasting elsewhere, or download it as a plain text (.txt) file with standard diff notation (+ for additions, - for deletions). The export preserves all formatting and change indicators.

What is the difference between side-by-side and unified view?

Side-by-side view displays the original text on the left and modified text on the right in two columns, making it easy to see changes at a glance. Unified view shows all changes in a single column with + and - indicators, similar to Git diffs. Side-by-side is better for visual comparison, while unified is more compact and mobile-friendly.

How do the ignore case and ignore whitespace options work?

Ignore case treats uppercase and lowercase letters as identical (e.g., "Hello" = "hello"). Ignore whitespace removes all extra spaces, tabs, and line breaks before comparison, focusing on content rather than formatting. These options are useful when comparing code that may have different formatting or capitalization conventions.

Is my text data safe and private?

Yes, absolutely. All text comparison happens entirely in your browser using client-side JavaScript. Your text is never sent to our servers or stored anywhere. The tool works completely offline once loaded, ensuring complete privacy and security of your sensitive data.

What is the maximum text size I can compare?

Each text input can contain up to 500,000 characters (approximately 500KB). This limit ensures smooth performance without freezing your browser. For larger files, consider splitting them into smaller sections or using command-line diff tools.

Can I use this for code review?

Yes! This tool is perfect for code review. Use line-by-line mode to compare code versions, review pull request changes, or track modifications. The color-coded highlighting makes it easy to spot added, removed, or modified code. Many developers use it alongside Git for quick visual comparisons.

Text Diff Tool - Compare Text Side-by-Side Online Free

Why Use Our Text Diff Tool?

Our professional text diff tool provides the most accurate way to compare and find differences between two texts online. Whether you're reviewing code changes, comparing document versions, or tracking content modifications, our tool delivers precise results with an intuitive, visual interface.

Advanced Features for Better Comparison

Side-by-Side View: Compare texts in two columns with synchronized alignment, making it easy to see exactly what changed and where.
LCS-Based Algorithm: Uses the same Longest Common Subsequence algorithm as Git and professional version control systems for accurate change detection.
Multiple Comparison Modes: Choose between line-by-line for documents and code, word-by-word for sentences, or character-by-character for detailed analysis.
Color-Coded Highlighting: Green backgrounds for additions, red for deletions, with colored borders for quick visual scanning of changes.
Smart Line Pairing: Changed content appears side-by-side on the same row, making modifications easy to identify and review.
Flexible Filters: Ignore case differences or whitespace to focus on content changes rather than formatting variations.

Perfect for Developers and Professionals

This text comparison tool is ideal for code review, allowing you to quickly identify changes in pull requests, commits, and code refactoring. The side-by-side view makes it easy to spot added functions, removed code blocks, and modified logic. Many developers use it alongside Git for a more visual diff experience.

For content creators and editors, track document revisions, compare article versions, review contract changes, and validate translations. The detailed statistics show exactly how many additions, deletions, and unchanged sections exist between versions.

Privacy-First Design

All text comparison happens entirely in your browser using client-side JavaScript. Your sensitive code, documents, or data never leaves your computer. No server uploads, no storage, no tracking of your content. This makes it safe for comparing proprietary code, confidential documents, or personal information.

How Our Diff Algorithm Works

Unlike simple character-by-character comparison tools, our diff engine uses the Longest Common Subsequence (LCS) algorithm to intelligently detect:

Content that has been moved or reordered
Lines that are truly different vs just repositioned
Efficient pairing of deletions and additions for side-by-side display
Accurate change tracking even in complex documents

Why Use Our Text Diff Tool?

Advanced Features for Better Comparison

Side-by-Side View: Compare texts in two columns with synchronized alignment, making it easy to see exactly what changed and where.
LCS-Based Algorithm: Uses the same Longest Common Subsequence algorithm as Git and professional version control systems for accurate change detection.
Multiple Comparison Modes: Choose between line-by-line for documents and code, word-by-word for sentences, or character-by-character for detailed analysis.
Color-Coded Highlighting: Green backgrounds for additions, red for deletions, with colored borders for quick visual scanning of changes.
Smart Line Pairing: Changed content appears side-by-side on the same row, making modifications easy to identify and review.
Flexible Filters: Ignore case differences or whitespace to focus on content changes rather than formatting variations.

Perfect for Developers and Professionals

Privacy-First Design

How Our Diff Algorithm Works

Unlike simple character-by-character comparison tools, our diff engine uses the Longest Common Subsequence (LCS) algorithm to intelligently detect:

Content that has been moved or reordered
Lines that are truly different vs just repositioned
Efficient pairing of deletions and additions for side-by-side display
Accurate change tracking even in complex documents

Text Diff

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Quick Examples

Text 1

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Popular Use Cases

Why Use Our Text Diff Tool?

Advanced Features for Better Comparison

Perfect for Developers and Professionals

Privacy-First Design

How Our Diff Algorithm Works

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