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Text Diff Checker

Compare two text documents or code snippets to find additions, deletions, and modifications. Clear side-by-side and inline highlighted differences.

? How to use Text Diff Checker

1 Paste original text in the left pane and modified text in the right pane.
2 Differences highlight automatically with red for removals and green for additions.
3 Switch between word-by-word and line-by-line comparison modes.
4 Use the swap or clear buttons to test different comparisons quickly.

Key Features & Privacy Guarantee

Word-by-word and line-by-line diff comparison modes
Side-by-side and inline visual modes
Detailed stats: Added words/lines, removed, and total changes
100% private: Sensitive texts never leave your computer
🔒 Complete Privacy: All computations, conversions, and renders occur locally in your browser. No files or personal data are ever uploaded to any server.

About Text Diff Checker

Text Diff Checker compares two versions of a text and highlights what changed. Paste the original on the left and the modified version on the right, and additions appear in green while removals appear in red.

Switch between word-by-word and line-by-line comparison, and between side-by-side and inline views. Summary statistics count the added and removed items. The comparison runs locally, so sensitive drafts and code stay on your computer.

Common ways to use it

See what an editor or colleague changed between two drafts of a document.
Compare two versions of a config file or snippet of code.
Check whether two blocks of text are really identical.