About Text Diff Checker
The Text Diff Checker compares two blocks of text line by line and highlights every difference. Lines that were removed from the original are shown in red, and lines that were added in the modified version appear in green. Identical lines are displayed normally.
How to Use
- Paste your original text in the left textarea.
- Paste the modified version in the right textarea.
- Click Compare Texts to see the differences highlighted.
Use Cases for Text Diff
Text diff tools are essential for reviewing code changes, comparing document revisions, verifying copy edits, checking translation accuracy, and auditing configuration file updates. They help you spot every change quickly without reading through entire documents.
Frequently Asked Questions
How does the comparison work?
The tool compares both texts line by line. Lines present only in the original are marked as removed (red), and lines present only in the modified text are marked as added (green).
Can I compare large texts?
Yes. The tool runs entirely in your browser and can handle texts with thousands of lines. Performance depends on your device.
Does it detect moved lines?
The current version performs a line-by-line comparison. If a line moves to a different position, it will show as removed from the old position and added at the new one.
Is whitespace considered in the comparison?
Yes. Differences in spaces, tabs, and trailing whitespace are all detected and highlighted.
Is my text sent to a server?
No. All comparison processing happens locally in your browser. Your texts are never uploaded anywhere.