Diff Checker / Text Compare
Compare two blocks of text and highlight every addition, deletion and change — side by side or unified. Free, in your browser.
Paste the original text on the left and the changed text on the right — differences are highlighted instantly. Nothing is uploaded.
About Diff Checker / Text Compare
The Diff Checker compares two blocks of text and highlights exactly what changed. Paste the original into one pane and the modified version into the other; the tool computes a line-based diff and renders every addition, deletion and changed line, with word-level highlighting available inside changed lines to pinpoint the edit.
Two views cover different habits: a side-by-side layout that mirrors code-review tools, and a unified view like a classic patch. Options let you ignore case differences and ignore whitespace so reformatted code doesn’t drown out real changes, and a summary counts additions, deletions and changed lines at a glance.
A swap button flips the two sides, the result can be copied, and identical inputs are called out explicitly. The comparison runs entirely in your browser, which makes it safe for contracts, config files and unreleased copy — nothing is uploaded.
How to use Diff Checker / Text Compare
- Paste the original text into the left pane and the changed version into the right.
- Choose the view: side-by-side or unified.
- Toggle “Ignore case”, “Ignore whitespace” or word-level highlighting as needed.
- Read the highlighted result and the additions/deletions summary.
- Use Swap to reverse the comparison, or copy the diff for sharing.