How to Use the Text Diff Checker
Paste your original text into the left box and the changed version into the right box, and every added word is instantly highlighted in green while every removed word is shown with a red strikethrough — unchanged words are left as plain text, making it easy to see exactly what changed between the two versions at a glance.
The comparison runs entirely in your browser and updates live as you edit either text box.
Reading the highlighted result
As covered in the word-level-diff guide, each highlighted change represents a whole word being added or removed, which keeps the comparison readable even when a change is as small as a single-letter correction within a word.
When to reach for this instead of a word processor
As covered in the diff-tools-vs-track-changes guide, this tool is most useful for comparing two versions that weren't actively tracked together as edits happened — a before-and-after draft, or text pulled from two separate sources entirely.