Add Signature to PDF - Digital Signature Tool - Digi File Tools
Add digital signatures to PDF documents using drawing pad or image upload. Drag & drop signatures, apply to all pages, with live preview. 100% browser-based and secure.
101 uses
Last updated: 23 Dec, 2025
100% client-side processing
1. Upload PDF & Create Signature
Upload PDF
Drag & drop your PDF here
or click to browse
Create Signature
How to Use
- 1 Upload your PDF and create/upload a signature simultaneously.
- 2 Drag signature onto PDF preview - it will appear instantly.
- 3 Click any signature to select and adjust its size, position, or opacity.
- 4 Use Undo/Redo buttons if you make a mistake.
- 5 Download your signed PDF when finished.
Keyboard Shortcuts
- Arrow Keys Move selected signature
- Ctrl + / - Zoom in/out
- Ctrl+Z / Ctrl+Y Undo/Redo
- Delete Remove selected signature
- Click + Drag Move signature