Text Diff Checker
Free text diff checker. Paste two versions of any text and instantly see added, removed and changed lines highlighted, with change statistics.
How to use Text Diff Checker
- 1
Paste the original text in the first box.
- 2
Paste the new version in the second box.
- 3
The diff appears below with additions in green and removals in red.
- 4
Review the change stats and copy the unified diff if needed.
Key features
Line-based diff with LCS algorithm
Green / red color coding
Change statistics (added, removed)
Side-by-side comparison view
Handles code, config and prose
Runs entirely in your browser
Text Diff Checker — FAQ
It computes the longest common subsequence of the two inputs, then marks every line that differs — the standard approach used by git and diff tools.
Yes — this tool handles several thousand lines comfortably. Very large inputs may show only the first differences for performance.
No, comparison happens locally in your browser, so you can safely diff confidential documents.
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