What is Text Plagiarism Checker?
4-word N-gram matching for accurate text comparison. Shows similarity % and matched phrases.
Use Cases
- ◆Paper originality
- ◆Plagiarism detection
- ◆Version comparison
How to Use
- 1Paste original
- 2Paste comparison
- 3Check
- 4View results
Features
- ✓Free
- ✓N-gram matching
- ✓Percentage
- ✓Phrase list
FAQ
What is a plagiarism checker?
An online tool that compares two texts for similarity using N-gram analysis. Input is an original text and a comparison text, output is a similarity percentage and a list of matched duplicate phrases.
What algorithm does it use?
4-word N-gram matching. Texts are split into consecutive 4-word groups and cross-compared, accurately identifying phrase-level duplication.
How is this different from Turnitin?
This tool only compares the two texts you provide. Turnitin scans your text against massive databases (papers, web pages). This tool is for direct text-to-text comparison, not database scanning.
Is my text uploaded to a server?
No. All text comparison runs locally in your browser using JavaScript. Data never leaves your device.
How much text can I compare?
Up to 10,000 characters per text, suitable for paragraph to short-article comparisons.
How is the similarity percentage calculated?
It counts matching N-grams as a percentage of total N-grams. For example: if 30 out of 100 four-word groups match, similarity is 30%.
Is this tool free?
Completely free. No signup, no login, no usage limits.
Does it work with Chinese text?
Yes. The N-gram algorithm works on word groups rather than individual characters, supporting both Chinese and English text comparison.