Add Signature to PDF Online

How does adding a signature to a PDF work?

You upload your PDF, open the signature tool, and draw your signature with a mouse, finger, or stylus. The editor adds it to the page as a movable and resizable element. When you export, the signature is embedded into the PDF and the finished file is ready to download.

Is my PDF private when I add a signature?

Yes. The signature workflow runs in your browser, so your PDF and signature are processed locally. We do not store, view, or access the document while you sign it. Closing the tab clears the editing session from memory.

Can I use the signature tool on mobile?

Yes. The signature canvas supports touch input, so you can draw with your finger on phones and tablets. It also works with mouse and stylus input on desktop devices.

Can I move or resize the signature after adding it?

Yes. After the signature is added to the PDF, it behaves like an editable image. You can drag it into position, resize it, delete it, and export only when it looks right.

Does adding a signature reduce PDF quality?

No. The original PDF content is preserved, and the signature is added as a new visual layer. The export keeps the existing pages intact while embedding the signature where you placed it.

Is this an electronic or certificate-based digital signature?

This tool adds a visual handwritten signature to your PDF. It does not apply a certificate-based digital signature or legal identity verification. For regulated signing workflows, use a dedicated e-signature provider.