Text Similarity Checker
Compare two texts and get a similarity percentage score. Measure how similar or different two blocks of text are.
About This Free Online Text Similarity Checker
Our free online Text Similarity Checker compares two blocks of text and calculates a similarity percentage using multiple algorithms. Get an overall similarity score, see which phrases and sentences are shared between texts, and view detailed breakdowns of word overlap, character overlap, and longest common subsequence. Perfect for checking document similarity, verifying rewritten content, comparing drafts, and detecting overlap between texts. All processing runs in your browser.
Features of Our Text Similarity Checker
- Overall similarity percentage score
- Word overlap analysis
- Character-level similarity
- Longest common substring detection
- Shared phrase highlighting
- Detailed breakdown statistics
- 100% private — browser-only processing
How to Use the Text Similarity Checker
The Text Similarity Checker works right in your browser — no signup, no installation. Follow these steps:
- Paste the first text into the left textarea.
- Paste the second text into the right textarea.
- View the similarity percentage and detailed analysis instantly.
- Use the breakdown to understand which parts match.
Frequently Asked Questions About Text Similarity Checker
How is the similarity percentage calculated?
The tool combines multiple metrics: word overlap (Jaccard similarity), character n-gram overlap, and longest common subsequence ratio for a comprehensive score.
What does a high percentage mean?
A high percentage (80%+) means the texts share most of their content. A low percentage (below 30%) means they are largely different.
Is this a plagiarism checker?
This tool measures similarity but is not a plagiarism checker. It compares the two texts you provide without searching external sources.
Why Choose the Text Similarity Checker?
Good analysis needs to be both fast and private. The Text Similarity Checker processes your text locally and shows results as you work, so you can iterate on drafts and data freely, knowing the content is never transmitted or stored.