Plagiarism Checker
Client-side comparison using N-gram matching. All data is processed in your browser.
Source Content
Reference Content (Up to 5)
Upload up to 5 plain text (.txt) files.
Options & Controls
Analysis Report
Highest Similarity
0%
Average Similarity
0%
Highlighted Source Text
Detailed Matches
Our Free Plagiarism Checker uses a simple yet effective keyword and n-gram matching method to detect similarities between your text and reference material. Whether you’re a student, blogger, teacher, or content creator, this tool quickly analyzes your content, highlights matching phrases, and provides an instant similarity percentage.
Unlike heavy plagiarism tools that require sign-ups or expensive subscriptions, this checker works 100% in your browser — meaning your data never leaves your device. Just paste your content, add up to five reference texts (or upload .txt files), and click “Compare.” The tool will scan for identical word sequences (n-grams) and display matches with color-coded highlights, making it easy to spot potential plagiarism.
You can adjust n-gram size, ignore common stopwords, set a match threshold, and even choose between Jaccard similarity or Cosine similarity for more precise results. Once the analysis is complete, you can export a detailed CSV report or save a highlighted HTML version of your text.
This plagiarism checker is perfect for quick, privacy-friendly checks without complex features. Detect plagiarism, improve originality, and protect your work — all for free.