Why Sign Documents with SmartAssPDF?
Easily execute employment agreements, NDA forms, vendor invoices, and real estate contracts with legal visual verification seals.
Quick Definition & Overview
PDF Signing stamps a cryptographic verification block with the signer's name, UTC timestamp, and optional signature graphic onto the document.
- Choice of handwritten cursive text or uploaded signature graphic
- Embeds UTC timestamp and audit verification badge
- Customizable placement (bottom-right, bottom-left, center)
Input
PDF / PNG
Output
Signed PDF
Privacy
Auto-Cleaned
Cost
100% Free
How to Sign a PDF
- Upload DocumentSelect the PDF requiring your signature.
- Configure Signer InfoEnter your name and pick your preferred position.
- Apply SignatureClick 'Process Sign PDF' to stamp the verified seal.
- Download Signed PDFSave your legally signed and stamped document.
Frequently Asked Questions
What signature methods are supported?
SmartAssPDF supports type-based digital seals with timestamp certification, uploaded image signatures (PNG/JPG with transparency), and cryptographic certificate sealing.
Where can I position the signature on my PDF?
You can position your signature in the Bottom Right, Bottom Left, Top Right, Top Left, or Center of the document pages.
Is a drawn signature legally valid?
In most jurisdictions (US, EU, UK), an electronic signature that clearly identifies the signer's intent is legally valid under e-signature laws (US ESIGN Act, EU eIDAS). The tool embeds your signature image into the PDF as a visible mark.
Can I sign on a specific page of a multi-page PDF?
Yes. You can navigate between pages in the Sign PDF studio and place your signature precisely on any page of your document.
What signature formats are supported for upload?
You can upload PNG or JPG signature images. PNG is recommended for transparent-background signatures so the page shows through around your signature.