This text diff checker compares two versions of your text line by line and highlights exactly what was added and removed. It is the fast way to spot changes between two drafts, two documents, or two versions of a code snippet.
How to use the diff checker
- Paste the original text on the left.
- Paste the changed version on the right.
- Read the highlighted result: added lines in green, removed lines in red, unchanged lines in grey, with a running count of each.
How the comparison works
The tool uses a classic line-by-line comparison (a longest-common-subsequence diff, the same approach code tools use). It lines up matching lines and marks the rest as inserted or deleted, so you can see at a glance what moved between versions rather than re-reading both from the top.
When a text diff helps
- Editing — see what a reviewer or co-author changed in your draft.
- Code — compare two snippets or config files without a full git setup.
- Contracts & policies — check what changed between two versions of a document.