Sign PDF on Mac

Sign PDFs on Mac for free.

No need to install Adobe Acrobat on your Mac. PrivaPDF runs directly in Safari or Chrome draw or type your signature and download the signed PDF in seconds.

Sign PDF on MacConvert PDF →

No account needed · zero uploads, verifiable in DevTools

Works in Safari, Chrome, Firefox on macOS
No software installation
Supports Apple Silicon (M1/M2/M3) and Intel Macs
Draw signature with trackpad
No upload runs locally
● SecurePDFcontract.pdf2.4 MBWASMYour browserlocalDOCXcontract.docx1.9 MBConverted in 1.8 s0 bytes sent to any server↓SaveNO SERVER

Signing PDFs on Mac without opening Preview's fiddly signature tool

macOS's Preview app technically supports adding a signature — captured via trackpad or the Mac's camera pointed at a paper signature — but the flow is buried in a toolbar menu and the camera-capture method is finicky to line up correctly.

PrivaPDF's sign tool works the same way in Safari or Chrome on macOS: draw directly with the trackpad, or type your name in a signature-style font, then place and resize it on the page — a more direct path to the same result.

Don't trust us.
Verify it yourself.

Open DevTools → Network while converting. You'll see zero outbound requests. Every byte stays inside your browser tab.

Works offline no internet connection required
Nothing is uploaded ever
Designed for sensitive documents
ZERO OUTBOUND CALLS
ElementsConsoleNetworkSources
FilterAll · XHR · JS · Wasm
NameStatusTypeSize
converter.worker.js200script48 kB
pdf.worker.wasm200wasm312 kB
✓ No requests to external servers
Powered byWebAssembly·Web Workers·pdf-lib·mammoth.js·Service WorkerAll open source · auditable in DevTools

Common questions

Does it work in Safari on Mac?

Yes. PrivaPDF is fully compatible with Safari 16+ on macOS. It also works in Chrome and Firefox.

Is there a built-in way to sign PDFs on Mac?

macOS Preview has basic signature support, but it lacks positioning control and doesn't handle multi-page PDFs well. PrivaPDF gives you more control for free.

Is my file uploaded to a server?

No. All processing happens entirely in your browser using WebAssembly. Your file never leaves your device.

Is it really free?

Yes. You get 5 free tool uses per day. No account or credit card required.

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