ProperPDF is an offline PDF app for Android 8.0 and later. It scans, merges, splits, organizes, converts, compresses, signs, fills and password-protects PDFs on the phone, without uploading them and without an account. The scanning, merging, splitting, organizing and conversion tools are free, with a ProperPDF watermark on saved files; Pro removes the watermark and unlocks compress, sign, fill, lock and the on-device AI chat. It doesn't edit the existing text in a PDF.
| Tool | iPhone and iPad | Android |
|---|---|---|
| Scan to PDF | Free | Free, with watermark |
| Merge PDF | Free, with watermark | Free, with watermark |
| Split PDF | Free, with watermark | Free, with watermark |
| Organize pages (reorder, rotate, delete) | Free | Free, with watermark |
| Image to PDF | Free | Free, with watermark |
| PDF to image (PNG or JPEG) | Free | Free, with watermark |
| Edit metadata | Free | Free |
| PDF viewer and document library | Free | Free |
| Compress PDF | Pro | Pro |
| Sign PDF | Pro | Pro |
| Fill PDF forms | Pro | Pro |
| Lock and unlock PDF (password) | Pro | Pro |
| AI chat and summary (on-device) | Free | Pro |
"With watermark" means files saved with that tool carry a ProperPDF watermark. Pro removes it.
A typical workflow
Scan the pages with the camera or open a PDF from another app. Merge it with attachments, remove pages with Split or Organize Pages, add a signature and share it from Android's share sheet. Each step saves a new copy, so the original stays available.
What it doesn't do
ProperPDF can't change the existing text in a PDF, convert PDF to Word, or add highlights and comments. Adobe Acrobat Reader and Xodo both annotate for free; text editing in Acrobat is a paid feature. PDFgear is a free option that edits text.
Offline, with one exception
The PDF tools need no connection. The AI chat needs a one-time model download before it works offline.
Questions
Does ProperPDF work offline on Android?
Yes. All PDF tools run on the phone. The AI chat needs a one-time model download first.
Which Android versions does ProperPDF support?
Android 8.0 and later.
Does ProperPDF have ads?
No. The free version adds a watermark to files saved with some tools instead.