PDF · Sign PDF
Sign the contract without the printer.
Your signature is drawn once and kept on your Mac as a transparent image, ready for every contract, form and letter after this one.
One-time purchase · macOS 26 Tahoe or later, Apple silicon recommended
How it works
Three steps, start to finish.
-
01
Open Sign PDF
Press ⌃⌥Space and type “sign”, or pick it from MightyBench’s menu bar icon.
-
02
Draw it, then place it
Draw your signature (it’s saved for reuse), choose the pages to sign, then drag it on the page or pick a corner. Size runs 10–60% of the page width.
-
03
Press Sign
A signed copy of each PDF is saved to a new dated folder in Downloads › MightyBench, with today’s date added if you turned that on. Originals stay unsigned.
The details
Small things, done properly.
-
Drawn once, kept locally
Your signature is stored on your Mac as a transparent image, so the next document only needs a drag and a click.
-
Exactly where it belongs
Drag the signature on the page preview to sit on the line, or choose a preset corner such as Bottom right.
-
Sized to the page
Set the size anywhere from 10% to 60% of the page width, from a narrow box to a full signature line.
-
Today’s date, added for you
Switch on Add today’s date and the date goes onto the page with your signature, so there’s nothing to type.
-
Sign a stack at once
Drop several PDFs and Sign PDF returns one signed file per input, so a pile of forms is done in a single pass.
-
An image, not a certificate
What goes on the page is an image of your drawn signature. It isn’t a cryptographic certificate and doesn’t pretend to be one.
Specs
Sign PDF, at a glance.
Draw once, sign anywhere.
| Opens | |
|---|---|
| Saves as | Signed PDF, one per input file |
| Settings |
|
| Needs | Nothing extra |
| Originals | Never changed |
| Saved to | Downloads › MightyBench › date Sign PDF |
How do I sign a PDF on a Mac?
Open Sign PDF, draw your signature and drop the PDF in. Drag the signature into place, or pick a corner, and press Sign. The signed copy lands in a new dated folder in Downloads › MightyBench.
Is this a certificate-based digital signature?
No. Sign PDF places an image of your signature on the page. It doesn’t add a cryptographic certificate, so use it where a drawn signature is enough.
Do I have to draw my signature every time?
No. It’s saved on your Mac as a transparent image and is ready for the next document.
Can it add today’s date too?
Yes. Turn on Add today’s date before you press Sign and the date is added along with your signature.
Can I sign several PDFs at once?
Yes. Drop in a batch and you get one signed PDF for every file you added, together in one dated folder in Downloads › MightyBench.
Where is my signature stored?
On your Mac, as a transparent image. It isn’t uploaded anywhere and there’s no account to sign in to.
Plus forty-eight other tools.
Sign PDF comes with every other MightyBench tool: video, audio, images, PDFs and on-device AI in one native Mac app. Pay $39 once for one Mac, with every MightyBench 1.x update included.
One-time purchase · macOS 26 Tahoe or later, Apple silicon recommended