Sign PDF
Add electronic signatures to your PDF documents. Draw, type, or upload transparent signature stamps.
Select PDF Contract or Document to Sign
Draw, type, or upload transparent signatures onto any page
About Sign PDF
NivoTools Sign PDF lets you electronically sign documents, contracts, agreements, and forms. Create signatures by drawing with a mouse/stylus, typing with elegant cursive calligraphy fonts, or uploading your scanned signature image with automated background transparency.
How to Use Sign PDF
Upload your contract or PDF document.
Create your signature: Draw with touch/mouse, Type your name, or Upload a signature image.
Drag and position the signature stamp onto the desired page location.
Add date stamps or name badges if needed, then click "Download Signed PDF".
Supported Formats & Limits
- Supported Inputs: PDF
- Guest Maximum Size: 25 MB
- Logged-in Max Size: 100 MB
- System Compatibility: Windows, macOS, Linux, iOS & Android
Privacy & Security Guarantee
This tool processes your files entirely inside your web browser using client-side JavaScript, WebAssembly, and Canvas APIs. Your document is never uploaded to any external server, guaranteeing total confidentiality.
Frequently Asked Questions
Is this electronic signature legally binding?
This tool generates an electronic visual signature. For commercial contracts this is widely recognized, though specialized government filings may require cryptographic digital certificate signatures (DSC/token).