PDF Signer

PDF Signer is a practical PDF toolkit for signing, stamping, editing, and converting documents on Android.

Key features:

* Create handwritten signatures and save reusable signature assets.
* Import transparent image signatures and place them precisely on PDF pages.
* Create document marks and seals, then stamp selected pages.
* Add across-page seals for multi-page document workflows.
* Merge, split, reorder, delete, rotate, crop, and extract PDF pages.
* Convert images to PDF and export PDF pages as images.
* Add page numbers, redact content, remove passwords, and restrict document permissions.
* Preview results before saving a new copy.
* Share exported documents through the Android system share sheet.

PDF Signer processes ordinary document editing workflows locally on your device. Your original files are not silently overwritten: exported results are saved as new copies.

The app supports English, Simplified Chinese, and Traditional Chinese, with a clean interface for everyday document work.