Plagiarism Checker (Basic — Local)
Compare your text against texts you paste to find matching sentences and repeated phrases — free, fast and private.
Local-only check. It compares only the texts you paste here. It cannot check the live web or Google's index — a real web plagiarism check needs a server/index.
How to use Plagiarism Checker (Basic — Local)
- Paste the text you want to check into Text A.
- Paste one or two source texts into Text B and Text C.
- Click Check Overlap to see the percentage of matching sentences and 5-word phrases, plus any repeated sentences inside Text A.
- Matching sentences in Text A are highlighted below the report. Use Copy Report to copy the results.
Note: this tool runs in your browser. Nothing is uploaded. A low overlap here does not prove originality on the web, and a high overlap only proves similarity to the texts you pasted.
Frequently Asked Questions
Is this a real plagiarism checker?
It is a basic local-only check. It compares only the texts you paste here and cannot search the live web or Google's index. A real web plagiarism check needs a server with access to a web index.
How is the overlap percentage calculated?
The tool splits your text into sentences and 5-word phrases, then reports the share of your sentences and phrases that also appear in the comparison texts you pasted.
Does it check for repeated text inside my own text?
Yes. It also flags sentences that appear more than once inside Text A itself, so you can spot accidental self-repetition.
Is my text uploaded anywhere?
No. Everything runs in your browser. Your texts are never uploaded to a server.