AI Writing Probability for PDF Text

Local extract, optional AI-powered estimate with signals - not forensic proof. Privacy-first by design.

How to check AI writing probability

  1. Open your PDF: Text is extracted in the browser. Sparse scans can use local OCR first.
  2. Preview and opt in: Review the text that would be sent, then consent to the AI-powered estimate.
  3. Read the score and signals: See an estimated probability, a likely AI / human / uncertain label, and supporting signals.

Why this tool

  • Probability + signals: A calibrated 0–100% estimate with short evidence notes - not a single opaque verdict.
  • Text only leaves the device: The PDF stays local. Only extracted text you approve is sent to Workers AI.
  • Honest limits: Estimates can be wrong. Treat the score as a hint, not proof of authorship.

Frequently asked questions

Is this a definitive AI detector?

No. It is an estimate based on writing patterns. Do not use it as forensic or disciplinary proof.

Does Paprkit upload my PDF?

No. Extraction runs on your device. The optional AI step receives text only after you consent.

Does it use my daily AI quota?

Yes. Each check counts as one AI call on your plan, same pool as Ask and Summarize.