AI Detector — See the AI, Sentence by Sentence
Paste any text and CheckAI shows which words and sentences read as AI-generated, at the token level. Detect content from ChatGPT, Claude, Gemini and more — then rewrite the flagged parts if it is your own draft.
An AI detector estimates whether content was created by an AI model rather than a person. CheckAI scores text at the word and sentence level — and also detects AI images and video — so you see where the AI signal is, not just one number. It is free to start with 20 checks daily.
How the AI detector works in 3 steps
Paste your content
Add text, or switch to image and video detection. CheckAI analyzes it instantly with no sign-up wall to get your first result.
See the token-level result
Get a word- and sentence-level heatmap, not just one overall percentage — so you can see where the AI signal really is.
Detect, then act
Confirm what is human, flag what is AI, and rewrite flagged sentences inline if the text is your own draft.
More than a single AI score
Token-level evidence across text, images, and video — in one tool.
Token-level precision
See the exact words and sentences driving the score instead of a single number you have to trust blindly.
Text, image & video
One detector for AI-written text, AI-generated images, and AI video frames — same account, same credits.
Detect and rewrite
If the text is yours, rewrite the flagged parts and re-check without leaving the editor.
Private by default
Submitted content is never stored or used for training.
What is an AI detector?
An AI detector estimates whether content was generated by an AI model rather than created by a person. Text detectors look for the statistical patterns that language models leave behind; image and video detectors look for the artifacts that generators produce. CheckAI does this at the token level for text, so instead of a single verdict you see which specific parts carry the AI signal.
What makes a good AI detector
Three things: evidence, honesty, and coverage. Evidence means showing where the AI signal is, not just a number. Honesty means acknowledging that no detector is perfect and false positives happen. Coverage means handling text, images, and video, since AI content now spans all three. CheckAI is built around all three rather than a single black-box percentage.
Detect AI anywhere you work
Use CheckAI in the editor for drafts and documents, or install the free browser extension to check text and images directly on any webpage — including a screenshot of any area of the screen. Detection comes to your workflow instead of forcing you to copy content into a separate tool.
AI detector FAQ
How accurate is the AI detector?+
No AI detector is perfect, and any detector can produce false positives. CheckAI is designed to be transparent — it shows token-level evidence so you can judge each part for yourself instead of trusting a single number.
What can it detect?+
AI-generated text (from ChatGPT, Claude, Gemini, and others), AI-generated images, and AI video frames — all from one account.
Is the AI detector free?+
Yes. Every account gets 20 free credits daily with no credit card required. Upgrade to Pro or buy a credit pack for heavier use.
Do you store the content I check?+
No. Submitted content is never stored or used for training.
Detect AI in any content, with the evidence
Token-level AI detection for text, images, and video. Free to start, 20 credits daily.
Try the AI Detector Free