1. Choose the PDF
Select a PDF with readable text. The file stays on your device.
PDF to Flashcards
Turn your PDF into interactive flashcards. Reveal one answer at a time and track how many ideas you already know.
Choose a PDF to begin.
✓ Flip each card · Known and review controls · Local PDF processing
How this PDF tool works
2. Generate the material
Ninjitzu PDF analyzes up to 35 pages with local rules, without sending the document to an external AI.
3. Study actively
Reveal one answer at a time and track how many ideas you already know.
Frequently asked questions
Is my PDF uploaded to a server?
No. This version reads the text locally in your browser.
Does it work with scanned documents?
It needs selectable text. For a scan, use the OCR PDF tool first.
Does it use an external AI service?
No. This version uses local heuristic extraction, so it has no per-file AI cost.