Why can’t I type in some PDFs?
Scanned forms are images — use OCR or Fill only works on real AcroForm fields.
XFA forms?
Not supported. Convert to AcroForm elsewhere if needed.
Does Fill PDF Form keep my original?
Yes — download a new file and keep the source on disk as backup. (Fill PDF Form.)
Can I use Fill PDF Form offline after first load?
After the app shell and libraries are cached by your browser, many PDF tools keep working offline for that session.
What file size works best with Fill PDF Form?
Aim under ~50–100 MB depending on device RAM. Very large scans may stall older phones.