No. It is a lightweight line-by-line summary for quick checks.
Text Diff Checker
Compare before/after text with lightweight line-by-line diff counts for added, removed, and unchanged lines.
Runs entirely in your browser.
Sharing creates a URL containing your text. Avoid sensitive data.
Share not supported in this browser, use Download JSON.
Changed lines
Run Compare to view line-level differences.
About this tool
Text Diff Checker helps you compare before/after text with lightweight line-by-line diff counts for added, removed, and unchanged lines. It runs directly in your browser for speed and privacy with no sign-up required. Use the steps below to get results quickly, then copy or download the output and continue with related tools when needed. Try next: Remove Duplicate Lines • Text Sort Lines.
How to use
- Paste original content into the Before editor.
- Paste updated content into the After editor.
- Run Compare to compute line-level changes.
- Review summary counts and changed-line previews.
Related tools
Try next: Remove Duplicate Lines • Text Sort Lines • Word Counter.
Remove Duplicate Lines
Clean repeated lines with case, trim, keep-first/keep-last, and preserve-order controls for fast text deduplication.
Text Sort Lines
Sort multiline text A-Z or Z-A with numeric, case-sensitive, and empty-line controls for clean text ordering.
Word Counter
Count words, characters, sentences, paragraphs, and lines instantly with privacy-first processing in your browser.
Online Notepad
Write, edit, and save notes in a clean browser-based notepad with local autosave, import/export, copy, and fullscreen controls.
Frequently asked questions
Yes, but very large inputs can take longer to process in-browser.
No. Diffing runs locally on your device.
Unchanged lines are lines matched in both before and after content.