Sign PDF : Secure eSignature

Turn your iPhone into a secure, pocket-sized document signing studio.

Whether you are executing a time-sensitive agreement, preparing client paperwork, or adding a corporate stamp to an invoice, Sign PDF lets you get it done instantly. No subscriptions, no mandatory account creation, and no uploading your sensitive files to a random cloud server.

Everything happens locally right on your device.

Key Features:

Smart Document Scanner: Use your camera to digitize physical paperwork. We automatically detect edges, correct perspective, and flatten the image into a crisp, readable PDF.

Precision Ink Engine: Draw your signature or initials directly on the screen with smooth, native pen strokes that look like real ink.

Intelligent Stamp & Signature Import: Have an existing physical stamp or a signature on paper? Snap a photo, and our on-device AI instantly removes the background, leaving you with a perfectly transparent, draggable digital asset.

Zero-Friction Matrix: Pinch, scale, and rotate your signatures and stamps to place them perfectly on any line, then flatten the document into a finalized PDF.

Privacy-First Architecture: Your documents are your business. Because there is no backend database, your files and signatures remain completely private and offline.

Universal Import: Pull existing PDFs directly from your Files app, iCloud, or Photo Gallery.

Designed for Professionals
Built for the speed and security required by modern business. Execute NDAs, authorize forms, and sign off on deliverables in seconds, then instantly share the flattened PDF via email, AirDrop, or your preferred messaging app.