What Does the Text Diff Checker Do?
The Text Diff Checker compares two versions of a text line by line and highlights exactly what changed: lines that were removed appear in red with a minus sign, lines that were added appear in green with a plus sign, and unchanged lines stay neutral for context. A summary tells you at a glance how many lines were added and removed — or confirms that the two texts are identical.
The comparison uses the same longest-common-subsequence algorithm family that powers developer tools like git diff, so the output feels familiar and precise. Options let you ignore case differences and leading/trailing whitespace, which is handy when formatting noise would otherwise drown out the real edits.
How to Use the Diff Checker
- Paste the original text into the left box.
- Paste the changed version into the right box.
- Optionally tick "Ignore case" or "Ignore leading/trailing spaces".
- Click Compare Texts and read the highlighted result.
When a Diff Checker Saves the Day
- Contract and document review — see exactly what a counterparty changed between two versions of an agreement.
- Editing and proofreading — compare a draft against the edited copy to review every alteration.
- Code review without a repo — diff two config files or scripts that were never committed to version control.
- Content audits — check what changed between two exports of a product description or web page.
- Duplicate detection — verify whether two similar-looking documents actually differ.