Sign PDF Online
Add digital text signature, initials, and stamp directly onto your PDF pages.
Select PDF File
or drag & drop PDF here
About Sign PDF Online
Add digital signatures (e-signatures) to your PDF documents easily, quickly, and securely online.
How to Use Sign PDF
Select PDF Document
Upload the PDF file that needs your signature.
Draw or Add Signature
Draw your signature using a touch screen, mouse, or upload a pre-drawn PNG signature.
Position & Download
Place the signature on the document layout and download the signed PDF.
Specifications & System Limits
100% Client-Side Privacy
Files are processed entirely within your browser memory via WebAssembly. Your documents never touch external servers.
Super Fast & No Waiting
Instant high-speed conversion with ultra-low latency. Never wait in arbitrary processing queues.
100% Free & No Watermarks
All PDF tools are accessible free of charge without watermarks, hidden paywalls, or required registration.
Frequently Asked Questions (FAQ)
No. Your signature drawing is rendered locally in the browser memory. We do not store or transmit your signature.
Yes, you can create and place multiple signature objects on any page.
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About Sign PDF Online
Add digital signatures (e-signatures) to your PDF documents easily, quickly, and securely online.
How to Use Sign PDF
Select PDF Document
Upload the PDF file that needs your signature.
Draw or Add Signature
Draw your signature using a touch screen, mouse, or upload a pre-drawn PNG signature.
Position & Download
Place the signature on the document layout and download the signed PDF.
Specifications & System Limits
100% Client-Side Privacy
Files are processed entirely within your browser memory via WebAssembly. Your documents never touch external servers.
Super Fast & Reliable
Instant high-speed conversion with ultra-low latency. Never wait in arbitrary processing queues.
100% Free & No Watermark
All tools on KAOpdf are completely free with no watermarks, no file limits, and no account registration required.
Frequently Asked Questions (FAQ)
Is my signature saved on the web?+
No. Your signature drawing is rendered locally in the browser memory. We do not store or transmit your signature.
Can I place multiple signatures?+
Yes, you can create and place multiple signature objects on any page.