TEXT DIFF CHECKER
Compare texts side-by-side, spot differences instantly.
Everything runs locally in your browser. Your data never leaves your device - no uploads, no servers, no tracking.
All processing happens directly on your machine using JavaScript. Close the tab and everything is gone. We literally never see your data.
Comparison mode
Conversion analytics
Choose mode
Select comparison type
Input texts
Paste or upload two texts
View differences
See changes highlighted
Why choose our Text diff checker?
Powerful comparison tools for developers and writers
4 comparison modes
Line-by-line, word-by-word, character-by-character, or unified view for precise difference detection.
Drag & drop file upload
Drop files directly into the editor. Supports TXT, MD, CSV, JSON, XML, HTML, CSS, JS, DOCX, ODT and more.
Split & Unified views
Side-by-side comparison or unified diff view. Choose what works best for your workflow.
Export to multiple formats
Download your diff results as TXT, Markdown, or DOCX. Share or archive comparisons easily.
Synchronized scrolling
Scroll both text panels together to keep corresponding lines aligned for easier comparison.
Color-coded changes
Visual highlighting with green for additions and red for deletions. Instantly spot every difference between two texts.
Frequently Asked Questions
Everything about comparing and analyzing text differences
What is a text diff checker?
A text diff checker compares two texts and highlights the differences between them. It shows what was added, removed, or changed.
How do I compare two texts?
Paste your original text in the left panel and modified text in the right panel. Select a comparison mode and click Compare to see the differences.
What are the different comparison modes?
Line mode compares line by line, word mode compares word by word, character mode compares character by character, and unified mode shows changes in a single view.
Can I compare code files?
Yes. Upload or paste any code files (JavaScript, Python, HTML, CSS, etc.) and the tool will highlight the differences with syntax preserved.
Can I save or export the comparison results?
Yes. Click the download button to save the diff as a text file, or use the copy button to copy the results to your clipboard.
What does ignore whitespace and ignore case do?
Ignore whitespace removes all spaces and line breaks before comparing. Ignore case makes the comparison case-insensitive (A = a).
Is my data safe with this tool?
Yes. Everything runs locally in your browser. Nothing is uploaded, nothing stored - your data stays 100% private.
What file formats can I upload?
You can upload TXT, MD, CSV, TSV, JSON, XML, HTML, CSS, JS, SQL, DOCX, ODT, and LOG files. Just drag & drop or click upload.
Can I compare large files?
Yes. Our diff checker handles texts of any size with optimized performance. For very large files (100k+ lines), comparison may take a few seconds.