Academic Plagiarism Checker

• Free online academic plagiarism checker that compares two texts locally to detect overlaps and calculate an overall similarity, suitable for thesis duplicate checking, assignment detection and academic integrity reviews
• Customizable detection settings: minimum match length (2–50), N-gram size, plus options for case sensitivity, ignoring whitespace and ignoring punctuation
• The result shows a similarity ring and a similarity level (high / medium / low / none), together with statistics for source, comparison, matched segments and matched characters
• Each matched segment shows its match rate, displays the overlapping content side by side, and can be copied individually; all processing runs locally in your browser

1. Open the tool page — no download or installation needed
2. Paste the texts to compare into the "source" box on the left and the "comparison" box on the right respectively
3. Optionally open the detection settings to adjust the minimum match length and N-gram size, then click "Start Check" (for a repeat run the button becomes "Re-Check")
4. Review the similarity statistics and the matched-segment list, and click the copy icon on any segment to copy it individually

• This tool is completely free and requires no sign-up
• Everything runs locally in your browser — nothing is uploaded
• The comparison is performed within this tool and does not connect to any external paper database; results are for self-reference and are not a substitute for professional plagiarism-checking services

Free online academic plagiarism checker tool supporting text similarity detection, document content comparison, and duplicate ratio analysis. Enter two texts for real-time similarity comparison with highlighted duplicate content. Suitable for thesis checking, assignment verification, academic integrity inspection, and more.

Open the tool page — no download or installation needed Paste the texts to compare into the "source" box on the left and the "comparison" box on the right respectively Optionally open the detection settings to adjust the minimum match length and N-gram size, then click "Start Check" (for a repeat run the button becomes "Re-Check") Review the similarity statistics and the matched-segment list, and click the copy icon on any segment to copy it individually

This tool is completely free and requires no sign-up Everything runs locally in your browser — nothing is uploaded The comparison is performed within this tool and does not connect to any external paper database; results are for self-reference and are not a substitute for professional plagiarism-checking services

Yes, Academic Plagiarism Checker is completely free. No download or installation required — it runs right in your browser.