Analyze
Submit a complete passage rather than an isolated sentence. Longer samples usually provide more useful signals.
Probability-based writing analysis
AI Detector & AI Humanizer
Analyze and improve your writing
Review possible AI writing patterns and improve AI-assisted writing with clearer phrasing, smoother sentence flow, and a more natural tone. Detection results are estimates and should always be considered with human judgment.
What Detec AI provides
Accessible tools for reviewing and improving written content.
Pattern Analysis
The detector reviews linguistic patterns and sentence variation to estimate whether text may contain AI-generated writing.
Clear Results
Review an AI probability estimate and use it as one part of a broader content assessment.
Privacy Information
Read our Privacy Policy to understand how submitted text and technical information are processed.
Review possible AI writing patterns
AI writing tools are commonly used for drafting blog posts, emails, educational material, marketing copy, and other written content. In some situations, readers and reviewers may want to better understand how a passage was produced.
Detec AI analyzes writing patterns and provides a probability-based assessment. The result is not definitive proof of authorship and should be reviewed alongside context, source material, draft history, and human judgment.
Improve AI-assisted writing with AI Humanizer
The Detec AI Humanizer improves repetitive or mechanical writing with clearer phrasing, smoother sentence flow, and a more natural tone while attempting to preserve the intended meaning.
Users remain responsible for reviewing the result, checking factual accuracy, respecting applicable rules, and disclosing AI assistance when required.
For Writers
Review drafts for repetitive or overly predictable writing patterns before publication.
For Educators
Use probability-based results as a supporting signal rather than as the sole basis for an academic decision.
For Editors
Review submitted content while considering research quality, accuracy, sourcing, and the writer’s documented process.
How the analysis works
The detector evaluates writing signals such as sentence structure, word-pattern predictability, and variation in writing rhythm. It uses those signals to produce a probability-based estimate.
AI detectors can produce false positives and false negatives, especially with short, formal, technical, translated, or heavily edited text. Results should therefore be treated as guidance, not as a final judgment.
No Account
Use the core writing tools without creating an account.
Probability Based
Results indicate likelihood rather than definitive authorship.
Human Review
Important decisions should always include contextual human review.
Clear Limitations
Short and highly structured text may be more difficult to classify.
Understanding the result
A probability score is a signal, not a verdict
An AI writing score estimates how closely a passage resembles patterns commonly found in machine-generated text. It does not identify the author, prove misconduct, or reveal which writing tool may have been used.
Human writing can sometimes appear predictable, particularly when it is formal, technical, translated, or heavily edited. AI-assisted writing can also contain personal details and natural variation. Because these styles overlap, every result needs context.
For important decisions, consider the score together with drafts, citations, document history, writing samples, and a conversation with the author.
Questions to ask before acting
01
Is the sample long enough?
Short passages provide fewer writing patterns to analyze and may produce unstable results.
02
What kind of writing is it?
Technical, legal, academic, translated, and formulaic writing may naturally appear more predictable.
03
Is there supporting evidence?
Draft history, notes, citations, and earlier writing samples can provide more useful context than a score alone.
04
Has a person reviewed it?
Automated analysis should support careful human review, not replace it.
A better way to review questionable content
Instead of making a decision from one percentage, use a repeatable review process that combines automated analysis with evidence and human judgment.
Read
Review the text yourself. Look for vague claims, unsupported facts, abrupt tone changes, and repeated structures.
Verify
Check citations, drafts, revision history, source notes, and earlier examples from the same writer.
Discuss
If the decision matters, ask the writer to explain the ideas, sources, and process used to create the work.
Why context changes the interpretation
Two passages can discuss the same idea while producing different writing signals. That difference does not prove who wrote either passage.
Structured passage
May appear predictable“Artificial intelligence has changed modern communication by improving efficiency, automating repetitive tasks, and supporting faster content production across many industries.”
Why it may receive a stronger AI signal:
- Broad statements without a specific source or experience
- Balanced sentence structure and predictable phrasing
- A formal tone with little individual detail
Context-rich passage
More individual detail“When our support team introduced an AI drafting tool, routine replies became faster. We still had to rewrite messages involving billing problems because customers needed explanations based on their specific accounts.”
Why it may appear less predictable:
- A defined situation rather than a general statement
- Concrete details about the people and work involved
- Natural variation in sentence length and purpose
These examples illustrate writing characteristics only. Either passage could have been written by a person, generated by a model, or created through a combination of both.
Important limitations
Some types of writing are harder to classify
Detection systems compare patterns; they do not observe how a document was created. Certain writing styles provide fewer distinctive signals and require more cautious interpretation.
Recommended approach: If a result could affect a grade, employment decision, publication, or professional reputation, do not rely on an automated score alone.
Short passages
A few sentences contain limited information about writing rhythm and variation.
Technical documents
Specialized terminology and standardized structures may naturally appear predictable.
Translated writing
Translation tools can alter sentence patterns even when the original work was written by a person.
Formal academic prose
Objective language, fixed terminology, and structured arguments may trigger false positives.
Heavily edited drafts
Grammar and style tools can make human writing appear more consistent or uniform.
Mixed authorship
Documents may include human writing, quoted material, templates, and AI-assisted sections.
Responsible use
Use automated analysis carefully and fairly
AI writing detection is most useful as an initial review signal. It should not be presented as unquestionable proof or used to make high-impact decisions without supporting evidence.
Tell users when automated analysis contributes to a decision.
Allow the writer to provide drafts, notes, and an explanation.
Protect confidential, personal, and unpublished information.
Document the evidence considered beyond the detector score.
Learn more about Detec AI
Review how the service is designed, read practical writing guides, and understand how submitted information is handled.
About Detec AI
Learn about the purpose of the tools, how results should be interpreted, and the principles behind the service.
Read moreWriting and AI guides
Read practical guides about AI writing patterns, false positives, editing, and responsible review.
Read morePrivacy information
Review how submitted text, analytics information, and other technical data are handled.
Read moreFrequently Asked Questions
Is the AI detector free?
Yes. You can use the Detec AI writing detector without creating an account.
Can AI detectors be 100% accurate?
No. AI detection systems provide probability-based estimates and may produce false positives or false negatives. Results should not be treated as definitive proof.
Do you store the text I submit?
No. Submitted input and generated output are processed temporarily and are not stored by Detec AI after the request is completed.
Who can use an AI writing detector?
Writers, educators, editors, researchers, and businesses can use detection results as one supporting signal during a broader content review.
What does the AI Humanizer do?
The AI Humanizer improves phrasing, readability, sentence flow, and tone while attempting to preserve the intended meaning. Users should review the output for accuracy and disclose AI assistance when required.
Should detection results be used for academic decisions?
A detection score should not be the sole basis for an accusation or penalty. Educators should consider context, drafts, source material, and direct communication with the student.
Ready to review your content?
Analyze writing patterns and review the result together with context and human judgment.
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