Sign a PDF on Mac, free and in the browser
Works in Safari, Chrome, Firefox and Edge on any Mac. Draw your signature on the trackpad, type it, or upload a photo of it. The PDF is signed on your Mac and never uploaded.
Signing tool
Drop a PDF, JPG or PNG here
or
Processed on your device. No upload, no account, no limits.
Click Add signature, then click on the page where it should go. Drag to move, pull the corner to resize, press Delete to remove.
Your signed PDF is downloading
Nothing was uploaded. The file was assembled in this tab and saved straight to your device.
Need signatures from other people, reminders or a legally robust audit trail? Try SignWell (affiliate link, it costs you nothing extra).
Three ways to sign a PDF on a Mac
macOS ships with Preview, which can add a signature through Markup. It works, but it has rough edges: capturing a signature with the camera needs good light and a white sheet, the trackpad capture is small, managed work Macs sometimes have Markup features restricted, and if you open the document in a browser or in Mail you are not in Preview at all. Adobe Acrobat's Fill & Sign is the second option, but it wants an Adobe account before it lets you download.
SignPrivate is the third way. Open the PDF in whichever browser you already have, sign it, and download it. Because the whole tool runs locally, it is as private as Preview and needs no account like Acrobat.
Step by step on macOS
- Drag the PDF from Finder, Mail or the Downloads stack onto the box above, or click Choose a file.
- Click Add signature. On a MacBook, draw with one finger on the trackpad while the Draw tab is active. Press slowly and the line follows your finger. If you prefer, switch to Type and enter your name, or Upload a photo of your signature taken with your iPhone.
- Click on the page where the signature belongs, then drag it into place. Pull the small corner handle to resize it. Add the date with one click if the form asks for it.
- Click Download signed PDF. Safari saves it to your Downloads folder by default; Chrome and Firefox do the same unless you changed the setting.
Tips for Mac users
- Drawing feels cramped? Make the browser window bigger before opening the signature box. The drawing area scales with the window.
- Signing with an iPad or iPhone instead. Open the same page on the phone, draw with your finger, and AirDrop the signed PDF back to the Mac. Or just finish the whole thing on the phone.
- Scanned paper forms. Photograph the form with the iPhone camera, AirDrop the photo to the Mac, and drop the JPG here. See how to sign a scanned document.
- Reusing your signature. Tick Remember on this device once and it is stored in Safari or Chrome on that Mac only. Nothing is sent anywhere.
Is it as private as Preview?
Yes. Preview keeps the file on your disk; SignPrivate keeps it in your browser's memory. Neither sends it to a server. You can confirm it by turning Wi-Fi off in the menu bar before you sign. The tool keeps working. Read the privacy policy for the full details.