AI Detector: Free & Fast
Test the originality of any written work
Detect AI for free before submitting your work. Get a quick scan to make sure your content sounds human.
What makes our AI detection tool worth using
Our AI content detector was built to give you a simple way to review your text without overcomplicating the process. It runs quickly, shows clear results, and helps you understand where your content stands.
Highlights the parts that matter
The report highlights parts of your text that appear AI-generated, helping you adjust where needed.
Free to use, no limits
On Detector.io, you can check up to 3,000 words per scan without logging in or paying.
Designed to be accurate
The tool uses finely tuned, precision-based models, making it easy to Detect AI.
Fast and easy to use
The scan takes just a moment and gives you a clear score, without clutter.
An AI detector that fits into any kind of work
This detector is designed to handle different types of writing, from short reflections to full reports, giving you quick feedback without disrupting your flow.
Blog posts
Check if your blog sounds natural and original. The tool scans for AI writing and helps you catch anything that feels too polished or off.
Case studies
Case studies can sound stiff without meaning to. A quick scan shows if any parts look AI-generated, so your work feels more like you.
Reports
Reports often repeat phrases or rely on templates. Check for AI patterns and clean things up before submitting.
Class assignments
Whether it’s a paragraph or a full paper, the detector checks for AI-written content and helps you avoid penalties.
How our detector analyzes text for AI patterns
Beyond detect AI — tools to refine and rework your text
Whether you're refining tone or checking for originality, Detector.io has the tools to help you get it right.
Plagiarism checker
Scan your text for matches across public sources and make sure your content is original.
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AI humanizer
Refine robotic or overly polished text into natural, human-sounding language.
Humanize now
Paraphrasing tool
Reword sentences clearly without changing the meaning — quick, simple, and useful.
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The rise of AI-generated content and the role of an AI detector
Check your work anytime with Detector.io, available for free
This free AI Detector helps you spot parts of your text that may come across as AI-written, so you can adjust with confidence.
Check for AIFrequently asked questions
How accurate is the AI detector?
Our AI detector is built for consistent, reliable results. It does a solid job spotting parts of a text that may have been written by AI. It works well across different types of content, from school papers to professional or creative work.
What makes this AI detector different?
This tool goes beyond surface-level checks. It can pick up on writing generated by major AI models, even if it’s been reworded or blended with human input. As a reliable GPT detector and more, it’s especially useful when reviewing mixed or edited content.
How does it check for AI?
Our AI checker looks at patterns often seen in AI writing, like repetitive phrasing, overly regular sentence flow, or a lack of natural shifts. These patterns are then compared to typical human writing to highlight what might need a second look.
Does your AI writing detector work in other languages?
Right now, the detector supports English only. Keeping the focus narrow helps the tool strive for higher accuracy. More language options may be added as the tool develops.
Is it free to detect AI with your tool?
Yes, our AI checker is free to use. You can run a scan without creating an account or paying anything. Just paste your text and get your results — quick and easy. It has a 3,000-word limit per use, but if your text is longer, you can simply split it and check each part separately.
Can I get help with flagged sections?
Yes. If you scan text to check for AI and something gets flagged, but you’re not sure how to revise it, you can use our extra support service. A professional editor can help smooth out the rough spots, rewrite flagged parts if needed, and make sure everything flows naturally and fits your voice.