1. Choose the PDF
Select a PDF with readable text. The file stays on your device.
PDF to Practice Test
Build a practice test from your PDF. Complete the questions without visible answers, then submit the test for a score and source-based corrections.
Choose a PDF to begin.
✓ Answers stay hidden · Timer and final score · Source-based review
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
Complete the questions without visible answers, then submit the test for a score and source-based corrections.
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.