Sign PDF on Windows

Sign PDFs on Windows for free.

Adobe Acrobat is overkill for a simple signature. PrivaPDF works in your Windows browser — Chrome, Edge, or Firefox — and lets you sign any PDF for free.

Sign PDF on WindowsConvert PDF →

No account needed · zero uploads, verifiable in DevTools

—Works in Chrome, Edge, Firefox on Windows
—No software installation
—Draw or type your signature
—No upload to any server
—Free — no watermarks
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 Microsoft Edge?

Yes. Microsoft Edge 110+ fully supports PrivaPDF. You can also use Chrome or Firefox on Windows.

Can I sign PDFs on Windows 10 or Windows 11?

Yes. PrivaPDF works on Windows 10 and Windows 11 with any modern browser installed.

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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