The easiest way to compare text differences. Find changes, fix revisions, and compare code instantly.
Result will appear here after clicking Compare.
Manually scanning two documents to find what changed is tedious and error-prone. Whether you are checking a student's essay revision, reviewing code changes, or comparing two contract drafts, a Text Diff Checker saves you time by visually highlighting the differences.
Our tool runs entirely in your browser using efficient algorithms to provide instant results without sending your data to any server.
| User | Use Case |
|---|---|
| Students & Writers | Compare drafts to see exactly what edits were made by a teacher or editor. |
| Developers | Quickly debug code by comparing a working file against a broken one. |
| Legal/Admin | Ensure no unauthorized changes were made to terms and conditions or contracts. |
Simple interface, powerful underlying logic.
We use standard semantic colors—Red for deleted text and Green for added text—so you can understand the changes at a glance.
See additions and removals instantly.
Your confidential text never leaves your browser.
Unlike other tools that upload your text to a server to process it, our Diff Checker works locally on your device. This makes it safe for sensitive documents, proprietary code, and personal data.
There is no strict limit, but pasting extremely large texts (e.g., entire books) might slow down the comparison slightly as it runs on your computer's processor.
Currently, this is a viewer-only tool designed to highlight differences. It does not support interactive merging or editing of the result.