Text Diff Checker
Compare two blocks of text and highlight additions, deletions, and changes.
The Text Diff Checker compares two blocks of text line-by-line using a Longest Common Subsequence algorithm, highlighting exactly what was added, removed, or left unchanged. Ideal for comparing code revisions, configuration files, documents, or any plain text content — no external libraries required.
About This Tool
- Paste your original text in the left panel
- Paste the modified text in the right panel
- Click Compare to see the differences
- Toggle between side-by-side and inline views
- Comparing code changes before committing
- Reviewing configuration file differences between environments
- Checking text edits in documents
- Verifying data migration results
- Green highlights show additions, red shows deletions
- Use inline mode for a more compact view of changes
- Works with any text — code, prose, configuration, data
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