Is a strong-signal result definitive proof the content is AI?

Only when a valid C2PA or SynthID credential is attached to the file. Without that credential, the result caps at moderate signals, even when the stylometric signals are very strong.

Can human text be flagged as AI by mistake?

Yes. Formal or academic text can produce stylometric signals similar to AI's. That's why those signals are never enough on their own for the highest result, and the report always lists this limitation.

What is EU AI Act Article 50 and why does it matter now?

It's the European Union rule requiring generative AI providers to mark their output in a machine-readable way, in force since August 2, 2026. The AI Detector checks for that mark when present; we don't guarantee third-party regulatory compliance.

Provenance Verifier

AI Detector for PDF

This isn't a statistical guess. It's a provenance audit: we check the C2PA/SynthID cryptographic credential before any probabilistic signal, and we never let stylometry alone decide a strong result.

Analyze a PDF See how it works

L1 (C2PA/SynthID) is required for strong signals

5 analysis layers, each with a defined role

Report with verifiable hash and timestamp

Aligned with EU AI Act Article 50

Sample reportMODERATE SIGNALS

Moderate signals. There are indications of AI but also human patterns. Manual analysis of highlighted passages is recommended.

Every report includes a public verification link.

EU AI Act Article 50

Since August 2, 2026, generative AI providers in the European Union are required to mark their output in a machine-readable way. The AI Detector checks exactly for that mark when it exists, and is honest about the limits when it doesn't.

Provenance Verifier

What the AI Detector actually checks

Three different roles, each with its own weight in the final result.

Primary

Cryptographic provenance (C2PA/SynthID). The only layer that can justify a strong-signal result.

Auxiliary

Text stylometry. Contributes to the result, but is capped at moderate signals, never alone deciding a strong result.

Informational

File forensics, semantic analysis and visual analysis. Enrich the report, but don't change the final score.

Generic statistical detector vs. provenance verifier

Generic statistical detector

Morpes AI Detector

Delivers a single percentage chance of being AI

Delivers a categorical band, with transparency about which layer justifies the result

Treats writing patterns as proof

Stylometry is auxiliary; never alone proves a strong result

Doesn't check the file's provenance marking

Prioritizes C2PA/SynthID credentials as the primary signal

See a sample report

This is what the result looks like before you spend real credits.

MODERATE SIGNALS

Moderate signals. There are indications of AI but also human patterns. Manual analysis of highlighted passages is recommended.

PrimaryHidden text layer

No C2PA manifest found in the PDF. Absence of C2PA doesn't prove human authorship; the chain may not exist or may have been removed.

See the full sample report →

Questions about the AI Detector

No. The result is a categorical band (no signals, weak, moderate, strong, or inconclusive signals), not a percentage. A single percentage would imply a precision that text stylometry doesn't have.

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Verifiable report with hash and timestamp, ready in minutes.

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