Optimize & secure guide
Sign a PDF Without Printing It
Updated
Short answer: Open Sign PDF, draw, type or upload your signature, click where it belongs on the page and download the signed copy.
Printing a form only to sign it and scan it back wastes paper and produces a crooked, grey copy. For the everyday documents that just need your signature on the line, you can do it in the browser in under a minute.
Step by step
Step 1: Fill in any form fields first, in your PDF reader, and save.
Step 2: Open Sign PDF and drop the document.
Open Sign PDF(runs on your device)Step 3: Create your signature: draw it with a mouse, trackpad or finger, type your name, or upload a photo of your signature on white paper.
Step 4: Choose the page, click where the signature goes, then drag and resize it to sit on the line.
Step 5: Download the signed file. To stop the form fields being changed afterwards, flatten it.
Open Flatten PDF(runs on our server)
Why this works, and what to watch for
Sign PDF runs entirely in your browser. The document is opened on your device, your signature is drawn onto the page you chose, and the new file is saved locally. Neither the PDF nor your signature is uploaded, and the signature is gone when you close the tab, so there's no stored copy of it anywhere for someone else to misuse.
What you get is an electronic signature in the everyday sense: an image of your signature placed on the document, equivalent to signing a printout and scanning it. That's accepted for a great many forms, letters, permission slips, invoices and agreements. It is not a certificate-based digital signature, the kind that cryptographically proves who signed and shows whether the file was altered afterwards. If a bank, government agency or contract specifically asks for a digital or qualified signature, use the signing service they nominate.
For a clean result from a photo, sign in dark ink on plain white paper, photograph it in good light and crop tightly. Drawing with a finger on a phone usually looks more natural than using a mouse. The signature is placed as a picture, so you can scale it without anything else on the page changing, and the rest of the document keeps its text and quality.
Order matters with forms. Placing a signature doesn't lock the fields underneath, so someone could still edit a filled-in value. Fill the form, sign, then run Flatten PDF: the field values become part of the page, and the document looks the same in every reader. Keep an unflattened copy in case you need to correct something later.