Text Diff
Compare two texts and visualize the differences line by line.
Text comparison, commonly known as diff, is a fundamental operation in software development and document management. It allows you to precisely identify which lines were added, removed, or remained unchanged between two versions of a text. This concept is the foundation of version control systems like Git, where each commit shows exactly what changed in the source code.
Our text comparison tool analyzes two pieces of text and presents the differences in a visual and intuitive way. Added lines are highlighted in green, deleted lines in red, and unchanged lines are displayed without special formatting. This makes it easy to quickly review changes without reading both texts in their entirety.
The algorithm used is based on the Longest Common Subsequence (LCS), the same principle employed by professional tools like the diff command on Unix and code review systems. This algorithm finds the optimal alignment between both texts, minimizes the number of reported changes, and produces clear and accurate results.
The tool is versatile and works with any type of text: source code in any programming language, configuration files, JSON and XML documents, plain text files, and more. It is especially useful for code reviews, comparing configuration files between environments, verifying document changes, and debugging.
All processing happens in your browser, ensuring your data privacy. No information is sent to external servers, making it safe for comparing proprietary code, sensitive configurations, and confidential documents.
Frequently Asked Questions
A text diff (short for difference) is a comparison between two texts that shows what was added, removed, or unchanged. It is the same concept used in version control systems like Git to show code changes.
Line-by-line diff splits both texts into lines and uses the Longest Common Subsequence (LCS) algorithm to find the optimal alignment. Lines present only in the original are marked as deletions (red), lines only in the modified text as additions (green).
Yes! This diff tool works with any text including source code, configuration files, JSON, XML, and plain text. It highlights differences line by line, making it easy to spot changes in code reviews or debugging.