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
privapdf.net/convert● SecurePDFcontract.pdf2.4 MBWASMYour browserlocalDOCXcontract.docx1.9 MBConverted in 1.8 s0 bytes sent to any server↓SaveNO SERVER

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.

Related tools

Convert CV to PDF →Convert Invoice to PDF →HIPAA PDF Converter →Merge PDF →Compress PDF →PDF to Word →