Single Purpose
Built Only to Sign
BulkSign overlays signature elements onto finalized PDFs. It is not a PDF editor - there are no routines for text changes, layout edits, or form creation.
Bulk PDF Signing
BulkSign
In DevelopmentA single-purpose Android utility for signing and bulk-signing PDF documents entirely offline. BulkSign overlays your signature across many finalized PDFs at once, processing every file locally on your device with zero data collection and no network access.
Bulk Signing
Whole batches at once
Fully Offline
No network permissions
Zero Tracking
No analytics, no ads
Bulk Mode
Sign Every PDF at Once
Apply your signature across a whole batch of documents in a single operation, with a progress notification while the batch is processed.
Offline Core
No Internet Required
BulkSign has no network sockets or communication permissions, so it is mechanically unable to send your documents to a remote server.
Local Processing
Documents Stay on Device
Files are read into local memory, signed inside the Android sandbox, and written back to your designated storage directory with no hidden copies or caches.
Signature Custody
Your Signature, Your Device
Signature graphics and inputs stay in the app's local sandbox, inaccessible to other apps and never transmitted or backed up to an external service.
Privacy Policy
Read how BulkSign maintains an absolute offline architecture, zero data collection, local signature custody, and minimal device permissions.
Read privacy policyTerms of Use
Review authorized use, the single-purpose scope, licensing, Google Play Billing, and support channels.
Read terms of use