OmniDetectOmniDetect
Multi-Engine AI Detection

Free Plagiarism Checker

Looking for a free plagiarism checker? Plagiarism is only half the risk. AI detection is the new dimension — and we publish how often ours gets it wrong.

Verified by 211-Sample Benchmark·94.2% Accuracy · 2.5% FPR · 96.1% TPR·See methodology →

Free scan: we analyze your first ~300 characters

0 / 10,000
|||.pdf, .docx, .txt
0-30: Likely Human31-70: Uncertain71-100: Likely AI

We keep your document so you can find it again, and you can delete it whenever you want. We do not sell it. Manage or delete

Why Multi-Engine Detection?

Single AI detectors disagree on 15-30% of texts. OmniDetect combines three independent engines for consensus — dramatically reducing false positives.

3 Independent Engines

Your text goes to the engine measured most accurate for its language, and the reasons behind the verdict come with it.

Consensus-Based Scoring

And when the reading is not confident enough to stand behind, we say so instead of printing a number.

Your text, your call

Your document stays in your history until you delete it, and you can delete it at any time. We do not sell it. GDPR compliant.

Frequently Asked Questions

Can OmniDetect check for plagiarism?
OmniDetect focuses on AI content detection using 3 independent engines. For plagiarism checking, we recommend pairing OmniDetect with dedicated tools like Turnitin, Grammarly, or Quetext for complete coverage.
Why do I need both plagiarism AND AI detection?
Plagiarism checkers find copied text. AI detectors find machine-generated text. A student could submit 100% original text that was entirely written by ChatGPT — a plagiarism checker would miss it completely.
Is the AI detection free?
Yes. OmniDetect offers 3 free scans per day with analysis by a real commercial engine on the first ~300 characters. No credit card needed. Sign up for 1,000 free Word Tokens to unlock all the measured engine.
What is the best free plagiarism and AI checker combo?
Use a dedicated plagiarism tool (Turnitin for institutions, Quetext or Grammarly for individuals) alongside OmniDetect for AI detection. This gives you both copied-text and AI-generated-text coverage in one workflow.
Can AI-generated text pass plagiarism checkers?
Yes. AI generates original text that won't match any existing source. Plagiarism checkers give it a clean bill — but AI detectors like OmniDetect catch the machine-writing patterns.

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