How the Diff Checker works
Our Text Diff Checker is a powerful file comparison tool that analyzes two text blocks to find exactly what was added, removed, or changed. When you click compare, the tool highlights insertions in green and deletions in red with a strikethrough. You can customize the algorithm to compare the text character-by-character, word-by-word, or line-by-line depending on your needs.
Diff Tool FAQ
Are my texts and code saved on your servers?
No. Just like all our utilities, privacy is guaranteed. The comparison algorithm runs 100% locally in your browser using Client-Side JavaScript. Your sensitive documents, code structures, or legal texts never leave your device.
What is the best comparison mode?
If you are comparing human-readable text (like essays or articles), "Words" mode is usually the easiest to read. If you are comparing source code (HTML, Python, JSON), "Lines" mode closely mimics professional Git tools.