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SIGNAL / 38
Find invisible characters and hidden Unicode
Exact code points, no folklore
Find invisible and special Unicode characters, see their positions, and distinguish typography from a verified watermark.
What the local check returns
AI signals you can inspect—not a verdict you have to trust
The report explains what was measured and keeps three questions separate.
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Writing patternsRepetition, sentence rhythm, vocabulary and punctuation
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Page evidenceDeclared metadata, page structure and resource references
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Reader qualityLong sentences, repeated phrasing and hidden Unicode
No AI probability score. This release describes signals but does not claim who wrote the text.
Inspecting locally…
Local analysis receipt
What this text shows
No upload
Plain-language summary
Start here
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Page evidence Provenance lens
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Reader quality Editorial lens
Technical measurement receipt
Exact counts, coverage and formatting checks
What was measured
extractor v1.2.0Formatting comparison
| Variant | Words | Sentences | Paragraphs | Characters | Text changed | Scalar count Δ | Writing measurements changed |
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Optional model
Named local detector is not in this release
The deterministic report above works now. A model button will appear only after the exact weights, hosting, formatting tests and held-out model card pass release review. No placeholder probability is shown.
Not enabled in this releaseInvisible does not mean AI-generated
Zero-width characters, non-breaking spaces, byte-order marks and bidirectional controls have legitimate uses and can also arrive through copying, publishing systems or damaged encoding. Their presence is an exact technical fact; their origin usually is not. This tool never calls a hidden character an AI watermark without an official verifier.
Read before using a result
What this cannot tell you
- A pattern match does not prove who wrote, edited or approved the text.
- Page builders, fonts and metadata describe a page, not the authorship of its words.
- Do not use this report as the sole basis for an academic, employment, moderation, publication or legal decision.
- Short, mixed-language, translated and heavily formatted text may produce findings without an eligible benchmark result.