Text Diff Checker
Compare two texts side-by-side and view line-by-line differences highlighted like GitHub diffs.
How do I use Text Diff Checker?
Paste your original text into the left panel.
Paste your modified text into the right panel.
Click 'Compare Text Diff' to analyze differences.
Review highlighted added (green) and removed (red) lines.
What features does Text Diff Checker offer?
Line-by-line text comparison using Myers diff algorithm
GitHub-style green (+) and red (−) visual diff highlights
Summary count of added and removed lines
100% Client-Side — zero data sent to external servers
Frequently Asked Questions about Text Diff Checker
Is my text data stored or sent anywhere?
No. Diff computation runs strictly inside your local browser memory using JavaScript — nothing is uploaded.
Can I compare code snippets as well as plain text?
Yes. You can compare code files, JSON payloads, HTML, CSS, configuration files, or any plain text content.
How do I compare files while ignoring whitespace differences?
Use the 'Ignore Whitespace' toggle option before clicking Compare. This will treat lines that differ only in spaces or tabs as identical, useful when you care about logical content changes only.
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