Text Diff Checker
Compare two texts side by side and spot every addition & deletion.
Private by architecture: this tool runs entirely in your browser. Nothing is uploaded anywhere.
Questions, answered.
Is my text uploaded?
No. The comparison runs entirely in your browser — handy for sensitive documents.
How does the diff work?
It compares line by line using a longest-common-subsequence algorithm, then highlights added lines in green and removed lines in red.