Free Online Text Compare Tool
Compare two blocks of text instantly. Highlight added, removed and changed words, detect extra spaces and empty lines, and get a full similarity report — 100% free and private in your browser.
Similarity Score
100% Private
All comparison happens locally in your browser. Your text is never sent to any server.
Instant Results
Compare thousands of words in milliseconds with real-time highlighting.
Word-Level Accuracy
Detects added, removed, and changed words — not just full lines.
Downloadable Reports
Export a clean, professional .txt report of every difference found.
Frequently Asked Questions
How does the Text Compare Tool work?
Paste your original text into the left box and the changed text into the right box, then click Compare Text. The tool analyzes both texts line by line and word by word to highlight every difference.
Is my text uploaded to a server?
No. This tool runs entirely in your browser using JavaScript. Your text never leaves your device.
What does the similarity percentage mean?
It represents how closely the two texts match based on matching lines relative to total lines in both texts. A higher percentage means the texts are more similar.
Can I download the comparison report?
Yes. Click "Download Report" to save a complete .txt file containing the summary statistics and detailed line-by-line differences.