What does signing a PDF online mean?

Signing a PDF electronically means adding your handwritten signature, initials, or a typed name onto the document as a visual mark — exactly where a paper signature would go. It lets you complete contracts, agreements, consent forms, and official paperwork without printing, signing by hand, and scanning the page back in. The result is a normal PDF that anyone can open and that keeps your signature fixed in place.

With Doctor PDF you draw your signature with a mouse or finger, place it anywhere on any page, then drag and resize it until it looks right. You can sign a single page or stamp the same signature across every page of a multi-page document.

When is an electronic PDF signature useful?

• Signing rental, employment, or freelance contracts sent to you by email.
• Approving invoices, quotations, and purchase orders quickly.
• Completing bank, school, or government consent and authorization forms.
• Signing NDAs and agreements when you don't have a printer or scanner.
• Adding your initials to several pages of a long document at once.

How Doctor PDF keeps your signed documents private

Your signature and your document are among the most sensitive things you handle, so Doctor PDF never uploads them. Drawing the signature and embedding it into the PDF both happen entirely inside your browser, on your own device — nothing is sent to any server, and no copy of your signed contract is stored anywhere online.

Because everything is processed locally, signing is instant, works without an internet connection once the page has loaded, and has no limit on how many documents you can sign per day.