AI Plagiarism Checker
Check content for plagiarism with AI. Analyze text against web sources, get an originality score, and see detailed matches. Free, no sign‑up, instant results.
What is an AI Plagiarism Checker?
An AI Plagiarism Checker scans your text for duplicate content by comparing it against public web sources and knowledge bases. This free online tool breaks your writing into sentences and phrases, then searches for matches using AI‑powered analysis. It provides an originality score and highlights which parts of your text appear elsewhere – perfect for students, bloggers, researchers, and content creators who want to ensure their work is unique.
How to Check Content for Plagiarism
- Paste your text into the "Web Check" tab (or use "Compare Texts" to check against a specific source).
- Click "Check Against Web Sources" or "Compare Texts".
- The tool analyzes your content sentence by sentence, searching for matches.
- View your originality score (0–100%) and detailed match results.
- Review highlighted passages that need attention.
Why Use This Free Plagiarism Checker?
- 100% free: No sign‑up, no credits, no word limits.
- Web‑based detection: Checks sentences against Wikipedia and public sources.
- Text comparison mode: Compare two texts side‑by‑side with diff highlighting.
- Originality scoring: Get a clear percentage score at a glance.
- Detailed reports: See exactly which sentences matched and where.
- Mobile friendly: Works perfectly on smartphones and tablets.
Frequently Asked Questions
It breaks your text into sentences and phrases, then queries public knowledge bases like Wikipedia to find matching content. It also provides a text‑to‑text comparison mode. Results are shown as an originality score with highlighted matched passages.
Yes, completely free. No sign‑up, no credits, no word limits. Unlimited checks.
Your text is only sent to public APIs (like Wikipedia) for matching. We do not store your content on any server.
Yes, the tool includes a 'Compare Texts' mode where you can paste an original source and a submitted text to see similarities highlighted side‑by‑side.
It checks against Wikipedia and other public knowledge bases via free APIs. For educational content and general articles, this provides a solid initial plagiarism screening.
Yes, the tool is fully responsive and works on smartphones and tablets.
This Nyxbo AI Plagiarism Checker is one of the best – it's free, private, and gives you instant originality reports with source matching.
Yes, but longer texts (over 5000 words) may take more time to process. We recommend checking in sections for very long documents.
The score (0‑100%) estimates how much of your text appears to be original. A higher score means fewer matches were found. This is a heuristic estimate, not a definitive legal judgment.
Yes, it's great for a first pass on essays and research papers. For formal submissions, you may want to use an institutional tool like Turnitin as well.