Add Signature to PDF Online Free
Add your signature to a PDF document online for free. Upload or draw a signature and place it anywhere with no account needed.
How PDF Signing Works
DocxLab places vector or raster signatures directly on PDF page layers using client-side PDF document manipulation.
Upload PDF Document
Select or drag your contract, invoice, lease, or form into the tool window.
Draw or Upload Signature
Create your signature using the smooth touchscreen drawing pad or upload an image file.
Position & Download
Choose target page and placement, scale the signature, and download your signed PDF instantly.
Frequently Asked Questions about Add Signature to PDF
Can I draw a signature directly on my touchscreen or with my mouse?
Yes. The built-in digital signature pad lets you draw smoothly with mouse or finger, or upload a PNG signature.
Can I position the signature on any page?
Yes. You can choose the target page, adjust exact placement, resize the signature, and preview before saving.
Is my confidential document uploaded to any server?
No. The entire signing process happens locally inside your web browser with zero server roundtrips.