Searchable PDF / OCR
Turn scanned pages into selectable text.
Request a tool
Vote once from this device. Results are public, and no account is required.
PDF annotations
Highlight, draw and comment on pages.
Batch PDF workspace
Run the same action on several PDFs.
Advanced unit checker
Check dimensional consistency across equations.
Study workbook export
Export saved examples as a polished workbook.
Custom form builder
Build reusable calculation forms locally.