🔍 Text Comparer
Compare two texts, find differences, and see similarity percentage.
100% browser‑based – no upload, private, free.
📄 Two‑panel diff
🎨 Highlighted changes
📊 Similarity score
Similarity:
0%
📋 What is a Text Comparer?
A text comparer (or diff tool) highlights the differences between two pieces of text. It's essential for:
- ✔ Comparing code versions (git diff style)
- ✔ Checking document revisions
- ✔ Finding changes in plagiarism detection
- ✔ Reviewing edited content
This tool uses the diff-match-patch algorithm from Google to compute character‑level differences and present them in an easy‑to‑read format.
✨ How to Use This Tool
- Enter or paste two texts into the left and right panels.
- (Optional) Enable “Ignore case” or “Ignore whitespace”.
- Click “Compare Texts” to see highlighted differences.
- View the similarity percentage and the diff view.
- Use “Swap texts” to exchange the two texts.
- Copy the result to clipboard.
All processing is done in your browser – no data leaves your device.
💡 Diff View Legend
- Green = Added text (present only in the right text)
- Red = Removed text (present only in the left text)
- Yellow = Changed text (different characters)
- Unchanged text appears normally.
❓ Frequently Asked Questions
The similarity is calculated based on the Levenshtein distance (edit distance) between the two texts. It reflects how many characters would need to be changed to turn one text into the other. For line‑based comparison, we also provide the diff view.
Yes, but performance may vary depending on your browser. For very large texts (over 1 MB), consider splitting them into smaller chunks.
No. The text comparison happens entirely in your browser using JavaScript. Your texts never leave your device – complete privacy.