The Diff Checker compares two texts line by line and highlights the differences using color coding. Added lines appear in green, removed lines in red, and unchanged lines are dimmed. This is the same concept used by version control systems like Git to show changes between file versions.
Use the diff checker to compare code changes before committing, verify configuration file updates, compare API responses, check document revisions, or debug differences between expected and actual output. It works with any plain text, not just code.
Frequently Asked Questions
What algorithm does the diff checker use?
The diff checker uses the Longest Common Subsequence (LCS) algorithm to find the optimal line-by-line comparison between the two texts, similar to how Git and other version control systems compute diffs.
Can I compare code files?
Yes, the diff checker works with any plain text including source code in any programming language, configuration files, JSON, XML, and more.
Does it show word-level differences?
Currently the tool shows line-level differences. If a line has even a small change, the entire line is marked as removed and the new version is marked as added.
Is there a size limit?
The tool runs in your browser, so it can handle reasonably sized texts. Very large files (thousands of lines) may take a moment to process depending on your device.
Is my data stored anywhere?
No. All comparison happens entirely in your browser using JavaScript. No data is sent to any server.