How to sign your PDF on Mac
- 1
Open this page in Safari or Chrome on your Mac and add the PDF you need to sign.
- 2
Draw, type or upload your signature, then click the page to place it.
- 3
Click Save and download the signed PDF.
Sign PDF on Mac: built-in options vs this tool
Preview can sign via the Markup toolbar. This page works the same on any computer and lets you add text and dates too.
It works in Safari, Chrome and Firefox on any Mac with nothing to install, including Apple-silicon and older Intel Macs.
Private by design
Your file is processed by your own browser, in memory. It is never uploaded, stored or seen by anyone, and the page’s security policy blocks it from sending data to other servers.
Frequently asked questions
How to sign a PDF preview?
Add the PDF, draw, type or upload your signature and click “Use signature”, then click the spot on the page where it belongs. Click Save signed PDF to download.
Does it work on Mac?
It works in Safari, Chrome and Firefox on any Mac with nothing to install, including Apple-silicon and older Intel Macs.
Is an electronic signature legally valid?
In the US (ESIGN Act), the EU (eIDAS) and many other countries, electronic signatures are legally recognised for most contracts. Some documents, such as wills or certain government forms, have special rules; check with the recipient if unsure.
What’s the difference between an electronic and a digital signature?
An electronic signature is a visible mark of agreement, like the one this tool adds. A digital signature is a cryptographic certificate embedded in the file that proves who signed and that nothing changed afterwards. This tool does not add certificates.
Is it safe to use with confidential documents?
Yes. The file is opened by your own browser and processed in your device’s memory. It is never uploaded, so no server, including ours, ever receives a copy. That makes it suitable for contracts, IDs, medical or bank documents.
Is it really free?
Yes. There is no sign-up, no watermark, no daily limit and no paid tier hiding the useful settings. Because your device does the work, it costs us almost nothing to run.