AI Detector By Originality.ai™ is the Most Accurate AI Detector in third-party studies. Run a free AI scan below.

















































Step 1
Add Text
Paste, Upload, or URL

Step 2
Scan
AI Detection, Plagiarism, Content Quality, and more

Detect AI Paraphrasing
Our team actively tests AI tools that change, modify, or edit text (e.g. Quillbot or Grammarly) and continuously improves our AI detector to ensure attempts to hide AI-altered text are still detectable.

Manage False Positives
Check for AI and plagiarism with the Originality.ai Chrome Extension.
Peace of mind for writers and students to show the authorship of writing, with a Writing Replay.


Writers, Editors & Marketers

Teachers & Students

Enterprise & Schools
Discover flexible pricing for students, teachers, small teams, agencies, publishers, and enterprise.

Is the Originality.ai AI detector free?
Is Originality.ai free, or is there a free Originality trial? Yes! You can use Originality.ai for free with a limit of 100 credits per account. Sign up here.
What Can Cause False Positives?
Tools that use AI to rewrite or edit copy (e.g., some Grammarly features) can cause false positives. Shorter text may impact accuracy; we have a 100-word minimum at Originality.ai.
How Can I Show My Work or Assignment is Original?
An AI score shouldn’t be used alone for academic integrity discipline.
Students and Writers: Share accuracy studies and show your writing process with our Chrome Extension.
Can I See Previous Scans?
Yes, scan history is stored for later retrieval or sharing. Complete removal of your account and data is available upon request.
What Languages Does Originality.ai AI Detection Support?
Originality.ai 5.0 and 5.0 Max automatically identify multilingual text, so you can intuitively scan for AI text in multiple languages.
Do Credits Expire?
Yes, per our Terms and Conditions, credits expire 2 years from the date of purchase.
How many free AI scans are there?
You can run free Originality.ai scans with a limit of 100 credits per account. Sign up here.
Do I need an account to run a free AI scan?
No, you don't need an account to run a free AI scan. Try an Originality.ai Scan for free with a limit of 100 credits per account. To scan more words and run additional scans, you can conveniently sign up for Originality.ai.
Is my pasted text stored, shared, or used for training?
Text input into the free AI detector may be used for training. Users with an Originality.ai account can opt out of data use for AI training.
What does the AI score mean?
AI scores show the percentage of your text that is: Likely AI, Likely Original, or Mixed writing, so that you can see how much of your writing involves AI. Read more about Originality.ai 5.0 and 5.0 Max.
Should an AI score be used on its own?
Use an AI score as one signal, not a final decision. Review other details like writing history and drafts before any high-consequence decisions. Always keep a human reviewer in the loop.
How does the Originality.ai AI detector work?
Originality.ai combines whole-document analysis with a dedicated model for sentence-level highlighting.
What Are AI Detection False Positives?
AI Detection false positives happen when human writing is incorrectly classified as AI-generated.
Note: False positive rates can vary by AI detection model and brand.