Free AI Detector Online
Use our free AI detector to check ChatGPT, Claude, Gemini, and other AI-written text. Get AI score, sentence highlights, sentence analysis, and vocab insights.
Check AI Writing Before You Publish
AI-written text used to be easier to recognize, but tools like ChatGPT, Claude, Gemini, and other AI writing models now make content read more smoothly and naturally. Detailed prompts also make it harder to judge by first impression. Decopy AI Detector helps you check essays, blogs, outsourced copy, and business documents before submission or publication.
Understand AI Detection Scores
AI detection is different from plagiarism checking. Plagiarism tools compare text with existing sources, while an AI text detector estimates probability from writing patterns such as sentence structure, vocabulary variety, repetition, transitions, and predictability. Decopy shows the percentage of AI, Mix, and Human text, so the result is easier to understand than a single score.
Review AI Sentence and AI Vocab
An overall score can show the detection result, but it cannot explain what to fix. Decopy’s AI Sentence analysis shows why specific sentences may be judged as AI-generated or mixed, then gives suggestions for revision. AI Vocab analysis reviews word-level signals and offers guidance on how to adjust the wording, so you can improve the text with a clearer editing direction.
Use AI Detection Responsibly
AI detection should support human review, not replace it or force every text toward 0%. A high AI score does not automatically mean dishonest writing, and a low score does not prove originality or quality. The result should be judged with the writing purpose, source material, author process, and final content quality.
AI Detection Tools for Deeper Review
Decopy helps you check large text, upload files, review AI, Mix, and Human results, and save online or PDF reports after detection.
Try AI Checker for Free
Start with a free trial AI checker for quick text review. You can run a basic check with trial credits and no complicated setup, making it easier to review drafts before submission or publication.
Large Text and File Upload
Check long-form content with support for up to 200,000 characters. Paste text directly, upload a supported file, or choose an existing file from My Assets, making the tool useful for large-scale content review.
AI, Mix, and Human Results
Decopy shows the percentage of AI, Mix, and Human text, so you can understand the result more clearly than a single score. This helps you see whether the writing looks mostly human-written, AI-generated, or mixed.
AI Sentence Analysis
AI Sentence Analysis explains why certain sentences may be judged as AI-generated, human-written, or mixed. You can try sentence-level analysis with free trial credits, including limited revision suggestions.
AI Vocab Guidance
AI Vocab looks at word-level signals and gives guidance on wording changes. You can try vocab-level analysis with free trial credits and preview practical wording suggestions.
Save Online or PDF Reports
Decopy creates a detailed report with AI, Mix, and Human results, text highlights, AI Sentence explanations, AI Vocab analysis, and revision guidance.
Writing Tips｜How to Make Your Text More Human-like
While Decopy AI Detector is built with advanced technology, no AI detection tool can be 100% accurate. We
strongly recommend not relying solely on any AI content detector when making decisions that could affect
your academic standing, professional reputation, or legal responsibilities.
To improve your
content’s originality and reduce AI detection scores, consider the following practical writing techniques:
- Add personal voice: Share real experiences or personal opinions.
- Be specific: Support your points with data, examples, or quotes.
- Use varied structure: Try rhetorical questions or advanced vocabulary.
- Simplify and paraphrase: Break long sentences into shorter ones.
- Think hypothetically: Use “what if” scenarios to show reasoning and creativity.
- Use active voice: Say “We completed the study,” not “The study was completed.”
- Include expert language: Use domain-specific terms when relevant to sound more credible.
- Quote real people: Expert opinions or interview excerpts add human depth.
How to Use Decopy AI Text Detector
Check AI-generated text online in three simple steps. Add your content, review the result, and save the report when needed.
Add Your Content
Check the Result
Save or Share the Report
AI Detection for Different Writing Needs
AI Text Detector
Use AI Text Detector to review texts and discover their true sources. Whether it is a paper, article, email, letter, etc.
AI Writing Detector
AI Writing Detector is great for improving writing skills and improving your work to ensure the originality of the content.
Chatgpt Detector
Chatgpt Detector is a professional AI Scanner that focuses on helping you defend against deceptive texts generated by ChatGPT.
AI Plagiarism Checker
AI Plagiarism Checker scans a huge database in seconds and accurately locates any copying or plagiarism.
AI Essay Detector
AI Essay Detector verifies the authenticity of any writing such as your articles or books, ensuring that they are not plagiarized and are written entirely by you.
AI Paper Checker
AI Paper Checker ensures the authority of the paper by verifying the authenticity of the paper and checking for plagiarism.
AI Code Detector
Our AI Code Detector can accurately identify and mark any potential plagiarized or reused code snippets to ensure that your intellectual property is not stolen.
AI Resume Checker
Use AI Resume Checker to continuously improve your resume and make it stand out in the job search arena.
AI Web Content Checker
SEO-friendly, AI Web Content Checker can scan any plagiarized or low-quality content to ensure that your website is always favored by search engines.
Who is AI Content Detector suitable for
Teachers
Literary writers
Content creators
Journalists
Legal practitioners
Data analysts
AI Detection for Different Writing Needs
Free Trial Basic Checks
Start with free trial basic checks when you need a quick first review of essays, drafts, articles, or business writing.
No Sign-Up Required
Basic detection does not require account registration, making it easier to start checking text right away.
Online AI Detection
Use the AI checker directly in your browser on desktop or mobile. The page is responsive, so you can check text without downloading software or installing extensions.
Fast Detection Speed
Get results quickly after submitting your text. This helps users review drafts, essays, articles, and business documents with less waiting time.
Clean Review Interface
A simple interface helps users focus on the detection result and next review steps without unnecessary distractions.
Multilingual Text Support
Users from different countries can check text in multiple languages, making the tool useful for international students, writers, editors, and global teams.
Who We Are | The Mission of Decopy AI
Writing has never been just about putting words on a page,
It’s how we express ideas, share emotions, and connect with others.
The rise of AI tools, from grammar checkers to paraphrasing assistants, has empowered millions of writers, especially non-native speakers, to communicate more clearly. We celebrate this progress and believe in the ethical use of AI in writing.
But as AI-generated content floods the internet, much of what we read now feels repetitive, hollow, and detached from real human thought. Trust is fading. Originality is at risk.
That’s why we built Decopy AI — not just another AI detector, but a full suite of tools for transparent, authentic writing.
- AI content detector: identifies AI traces within your text.
- Humanizer : rewrites AI-style content in a human, personal tone.
- Free to use, no login required, lowest character threshold in the industry.
Whether you’re a student, freelancer, content creator, or business user — you deserve to write with confidence.
At Decopy AI, we don’t draw lines between users. We remove the barriers. We respect your voice.
Let your ideas be expressed — perfectly and truly — through us.
What Are Our Users Saying
Frequently Asked Questions
Yes. Decopy AI Detector offers free trial AI detection, so you can quickly check text before submitting, publishing, or approving content. You can also try AI Sentence and AI Vocab analysis with free trial credits.
No sign-up is required for basic checks. You can start reviewing text online without creating an account.
Yes. Decopy works directly in your browser and supports desktop and mobile use. You do not need to download software or install extensions.
Yes. Decopy supports AI detection for multiple languages, making it useful for users from different countries who need to check essays, articles, reports, or other written content.
Yes. Decopy AI Detector supports long-form content up to 200,000 characters. You can paste text, upload a supported file, or choose an existing file from My Assets.
AI detectors estimate the probability of AI-generated writing by analyzing patterns such as sentence structure, vocabulary use, repetition, transitions, coherence, and predictability. The result should be treated as a review signal, not final proof.
AI means the text is more likely to be AI-generated. Human means it is more likely to be human-written. Mix means the text may contain both AI-like and human-like writing signals.
AI Sentence helps explain why certain sentences may be flagged as AI-generated or mixed. AI Vocab reviews word-level signals and gives wording suggestions, helping you understand which parts may need revision.
You can try AI Sentence and AI Vocab with free trial credits. Basic AI detection is available within the trial limits, and sentence-level or vocab-level details can also be tested during the free trial.
Yes. No AI content detector can guarantee 100% accuracy. Human-written text may sometimes be flagged as AI-generated, and AI-generated text may sometimes appear human-like. Results should be reviewed with context.
Review the highlighted parts carefully. Add clearer reasoning, stronger examples, specific details, source support, and your own voice. You can also use our AI humanizer to rewrite overly predictable sentences, but you should still review the final text manually. You do not need to chase a 0% score; the goal is to make the writing clearer, more original, and easier to verify.
An AI detector is used to review whether a text may contain AI-generated writing signals. It can help users check drafts, essays, articles, reports, and other written content, but the result should be combined with human judgment.
No. AI detection estimates whether text may have been generated by AI, while plagiarism checking compares text with existing sources to find copied or highly similar content. They are different types of review.
Uploaded files and AI detection results are kept private. They are not made public or shared with other users. Decopy does not permanently save your content, and you can delete history records or uploaded documents anytime.
Educators should use AI detection results as a review signal, not as the only basis for judgment. It is better to consider drafts, writing history, assignment requirements, source materials, and the student’s explanation together.