What is the AI Text Detector?
TextoLab analyzes statistical and structural characteristics in the supplied writing. It reports AI-like patterns without claiming to identify the author.
Writing pattern analysis
AI Text Detector
Explore statistical writing patterns in your text and understand the signals behind the result.
Text to analyze
For more stable results, use at least 150 words.
Your text changed. Analyze it again to refresh the report.
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Analysis runs locally on this device. TextoLab does not upload, store, or send this text to an AI provider.
Writing pattern report
AI-like pattern score
0%
Lower percentages mean fewer AI-like patterns; higher percentages mean more AI-like patterns.
Analysis confidence
This analysis identifies writing patterns commonly associated with AI-generated text. It cannot determine authorship with certainty.
Key findings
Highlighted passages are linked to significant findings. Select a finding or marked passage to inspect it.
These deterministic suggestions focus on clarity and variation. They do not rewrite your text or guarantee a different detector result.
How to use it
Paste a complete passage, choose Analyze Text, then read the score together with the Overview, highlighted passages, suggestions, confidence, and sample-size warning.
How the AI Writing Score works
The AI Writing Score combines several configurable signal families. Correlated evidence is limited and short samples are scaled conservatively. The score describes patterns in this sample; it is not a probability of AI authorship.
Signals analyzed
- Sentence-length rhythm and structural similarity.
- Vocabulary diversity and predictability proxies.
- Repeated phrases, openings, and content words.
- Paragraph shape, transitions, and punctuation behavior.
Interpreting the score
Low
Few strong AI-like regularities were found.
Moderate
Some patterns deserve review, but evidence is mixed.
High
Several pattern families contribute substantial evidence.
Very High
Strong evidence appears across multiple signal families; it still does not prove authorship.
Why AI detection is uncertain
Human writing can be highly regular, formal, or repetitive. AI writing can be edited, varied, translated, or mixed with human work. Both false positives and false negatives are possible.
Read the full accuracy and limitations guideWhy longer samples help
Longer samples provide more sentences, paragraphs, and vocabulary for comparison. Very short text can make one ordinary characteristic look disproportionately important, so TextoLab warns and reduces confidence.
Patterns the report may identify
- Repeated sentence openings or word sequences.
- Unusually similar sentence or paragraph shapes.
- Transitions repeated in regular positions.
- Limited punctuation or cross-paragraph style variation.
Frequently asked questions
Can this prove that AI wrote a text?
No. It is a heuristic writing-pattern report, not authorship proof.
Why can formal writing score higher?
Formal and technical prose may use consistent structures and repeated terminology. Findings must be interpreted in context.
Does TextoLab detect plagiarism?
No. It does not search external documents or the internet.
Why does sample length matter?
More text provides more independent evidence and makes statistical measurements less fragile.