About this tool
This tool is for spotting exactly what changed between two versions of a text — a contract revision, two drafts of an article, or a config file before and after an edit — without reading both side by side line by line yourself.
How to use it
- Paste the original text on the left.
- Paste the changed text on the right.
- Click "Compare" to see added lines, removed lines and unchanged lines highlighted.
Frequently asked questions
Does it compare word by word or line by line?
Line by line — each line in the original is matched against the changed text, and lines that don't match are marked as added or removed. For detailed word-level changes within a line, you'd need a dedicated code-diff tool.
Can I compare code with this?
Yes, for a general sense of what changed — though dedicated diff tools built into code editors and version control systems (like git diff) are better suited for reviewing actual code changes in detail.
Is my text uploaded anywhere?
No — the comparison runs entirely in your browser. Neither text is uploaded or saved.