✓ W3VJ Question Proof

Real PDF ↔ Excel comparison • Offline single-user prototype
MATRICES • 400 questions • 71 PDF pages
⚡ Fast review · Local autosave · PNG · Excel

✎ Question Review

PENDING
Q1 of 400
Compare Excel content with original PDF before approval. PDF location matching is automatic; correctness checking is not claimed.

Export & Backup

CSV includes review statuses and edited fields. PNG is cropped from the original PDF page image. Edits remain in this browser unless you export.

Keys: A Approve • F Flag • ← / → Navigate • Ctrl+S Save

▣ Original PDF Source

Page 1 / 71
Source position
100%
Red outline = approximate question region. Source remains unchanged; crop boundary can be adjusted in the exported PNG editor later.
Original PDF page

Review Safety

✔ Source PDF preserved without modification.
✔ New questions start Pending, never auto-approved.
✔ Question and options remain editable.
✔ PDF page location can be inspected.
✔ Review status saved locally and exported.
⚠ Math OCR, automated reasoning and multi-user login are not part of this demo.