Browser tool Runs locally
Text Diff Checker
Compare two blocks of text line by line and see additions and removals.
Original text
Changed text
Comparison happens locally in your browser. Text is not uploaded. Inline highlighting refines adjacent changed lines without changing the line-by-line diff.
Compare two versions quickly
Paste an original version on the left and the changed version on the right. The result marks removed and added lines so edits are easier to review.
What this comparison measures
This is a line-oriented text comparison. A changed line may appear as one removal and one addition; it does not attempt semantic or AI-based rewriting analysis.
Frequently asked questions
- Is the text uploaded?
- No. The comparison runs locally in your browser.
- Does it compare words or lines?
- The current diff is line-oriented, which works well for prose, configuration, logs, and code review at a simple level.
- Can it understand whether two sentences mean the same thing?
- No. It compares text, not meaning, and does not use an AI service.