Compare two texts locally with added, removed and changed lines. Use unified or side-by-side views, optional ignore rules and word highlighting.
01 / ORIGINAL
02 / MODIFIED
Compare up to 200,000 characters and 5,000 lines per text. Empty text is allowed. Example: change “Hello world” to “Hello Nimzoa”.
Line breaks, including a missing final line break, remain significant. Ignore capitalization uses Unicode lowercase comparison.
03 / COMPARISON
Enter both versions and select Compare Text.
Text stays in your browser without uploads or storage. Results are a readable comparison, not a version-control patch.
Enter your values locally; no inputs are uploaded.
Check validation feedback before reviewing the browser-generated result.
Review the explanation, copy supported outputs or reset the workspace.
Paste Original and Modified text, then select Compare Text. Open Advanced for view, ignore and word-highlighting options. Copy the comparison report or Reset.
Clear validation, full-width responsive controls, useful advanced options and private browser-local results.
Processing stays in your browser without uploads or storage.
Adjacent removals and additions are paired as changed lines. Unpaired insertions and deletions count as added or removed. This is a readable alignment, not semantic change detection.
Yes. Optional rules ignore spaces and tabs within lines or compare Unicode lowercase forms. Line breaks, blank lines and missing final line breaks remain significant.
Yes. CRLF, LF and CR endings are compared distinctly, and the comparison report labels line endings. The original inputs are never rewritten.
Each input supports 200,000 characters and 5,000 lines. Results show 200 rows per page. Bounded comparison falls back to replacement blocks when texts diverge heavily, with a visible notice.
Word highlighting is optional. Lines exceeding 500 word/whitespace tokens use whole-line highlighting to keep processing bounded.
No. Inputs and comparisons stay in browser memory. Copy Results creates a readable report, not a version-control patch.