Text Diff Checker
Compare two texts and identify added, removed, and modified lines with precise highlights.
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Original
Changed
Unified comparison
Changes
+1 added−0 removed3 modified
− The quick brown fox jumps over the lazy dog.+ The quick brown fox leaps over the lazy dog.− Clear writing starts with careful editing.+ Clear writing starts with thoughtful editing.− Every small detail matters.+ Every detail matters. The first draft is only the beginning.+ Good tools make revision faster.Large documents are diffed in a background worker — the page never freezes.
Readable line-level comparison
Green marks additions, red marks removals, and amber groups modified lines with their before-and-after text.
Clear answers
Frequently asked questions
Yes. The checker works with prose, source code, configuration, logs, and other line-based text.
Quick reference
Transformation reference
| Mode | Best for | Example |
|---|---|---|
| Added | New line | Green |
| Removed | Deleted line | Red |
| Modified | Changed line | Amber |
| Unchanged | Exact match | Neutral |
Keep transforming