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Sign a PDF on a Mac

Preview, included with macOS, can fill in PDF forms and add your handwritten signature. You create the signature once, with the trackpad, the Mac's camera or a nearby iPhone or iPad, and then place it where it goes.

With Preview

  1. Open the PDF in Preview. To fill in a form field, click it and type.
  2. Click Show Markup Toolbar if the toolbar is hidden, then click Sign.
  3. Create your signature. Trackpad: sign with your finger, press any key, then click Done. Camera: hold your signature on white paper level with the blue line, then click Done. iPhone or iPad: click Select Device if there is more than one, sign on the device, then tap Done.
  4. Click your signature to add it, drag it into place and resize it with its handles.

Signing on an iPhone or iPad needs a device that meets Apple's Continuity requirements.

Source: Fill out and sign PDF forms in Preview on Mac (Apple Support, checked 13 Nov 2026)

In your browser, with Lemurfile

Processed in your browser

Open Fill and sign a PDF

On that page:

  1. Drop your PDF on the box above, or click Choose a file. Its form fields, if it has any, appear below.
  2. Fill in the fields. Then draw your signature, type your name or upload an image of it.
  3. Choose the page, then click on it or drag the signature to where it goes, and set its size.
  4. Click Save signed PDF and download the file.