Diff Checker Online – Free Text Comparison & Difference Tool

Yes! Our free diff checker processes all text comparison entirely in your browser. Your sensitive data never leaves your device, ensuring complete privacy and security. We don't store, transmit, or have access to any of your data.

Our diff checker compares texts line-by-line. Additions (new lines in the modified text) are highlighted in green, removals (deleted lines from the original text) are highlighted in red, and modifications are highlighted in yellow/amber. Unchanged lines remain unhighlighted for easy comparison.

Our text diff tool can handle reasonably large text files, but very large files (over 10MB) may take longer to process. For extremely large files, consider breaking them into smaller sections or using a desktop diff tool.

Yes! After calculating differences, you can use the Previous and Next buttons in the toolbar to jump between differences. The tool shows you which difference you're viewing (e.g., "1 of 5") and automatically scrolls both text areas to show the corresponding change.

Yes! Each text area has its own search input. You can search for specific terms, use Enter to go to the next match, Shift+Enter for previous match, and Escape to clear the search. Press Ctrl+F to focus the search input.

Absolutely! Our diff checker is perfect for code diff checker functionality. It works with any programming language and provides clear visual highlighting of code changes, making it ideal for code reviews and version control.

Yes! Our text diff tool automatically synchronizes scrolling between the left and right text areas. When you compare text files, scrolling one side scrolls the other to the same position, making it easy to compare corresponding sections.

Our diff checker works with any plain text format. You can compare text files (.js, .py, .java, etc.), documents, configuration files, logs, or any text-based content. Simply paste your text into the text areas to find differences.